SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 2)¹

GCP Applied Technologies Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

36164Y101

(CUSIP Number)

JEFFREY C. SMITH

STARBOARD VALUE LP

777 Third Avenue, 18th Floor

New York, New York 10017

(212) 845-7977

STEVE WOLOSKY, ESQ.

ANDREW FREEDMAN, ESQ.

OLSHAN FROME WOLOSKY LLP

1325 Avenue of the Americas

New York, New York 10019

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

January 13, 2020

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨.

Note:  Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See § 240.13d-7 for other parties to whom copies are to be sent.

1              The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,733,830
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,733,830
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			PN

2

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			WC
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			CAYMAN ISLANDS
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					3,687,396
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					3,687,396
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			3,687,396
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			5.1%
	14	TYPE OF REPORTING PERSON
			CO

3

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE AND OPPORTUNITY S LLC
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			WC
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					559,184
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					559,184
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			559,184
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			OO

4

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE AND OPPORTUNITY C LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			WC
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					321,585
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					321,585
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			321,585
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			PN

5

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE R LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					321,585
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					321,585
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			321,585
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			PN

6

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE R GP LLC
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					589,808
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					589,808
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			589,808
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			OO

7

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE AND OPPORTUNITY MASTER FUND L LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			WC
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			CAYMAN ISLANDS
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					268,223
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					268,223
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			268,223
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			PN

8

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE L LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					268,223
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					268,223
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			268,223
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			PN

9

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD VALUE GP LLC
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,733,830
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,733,830
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			OO

10

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD PRINCIPAL CO LP
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,733,830
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,733,830
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			PN

11

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			STARBOARD PRINCIPAL CO GP LLC
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			DELAWARE
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,733,830
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,733,830
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			OO

12

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			JEFFREY C. SMITH
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					5,733,830
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					5,733,830
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			IN

13

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			PETER A. FELD
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					5,733,830
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					5,733,830
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,733,830
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			7.9%
	14	TYPE OF REPORTING PERSON
			IN

14

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			KEVIN W. BROWN
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			PF
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					815
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					815
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			815
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			IN

15

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			JANET P. GIESSELMAN
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			- 0 -
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			0%
	14	TYPE OF REPORTING PERSON
			IN

16

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			CLAY H. KIEFABER
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			PF, OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,133
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,133
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,133
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			IN

17

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			GAVIN T. MOLINELLI
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			- 0 -
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			0%
	14	TYPE OF REPORTING PERSON
			IN

18

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			MARRAN H. OGILVIE
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			PF, OO
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					5,357
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					5,357
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			5,357
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			IN

19

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			ANDREW M. ROSS
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
			PF
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					4,700
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					4,700
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			4,700
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			Less than 1%
	14	TYPE OF REPORTING PERSON
			IN

20

CUSIP No. 36164Y101

	1	NAME OF REPORTING PERSON
			LINDA J. WELTY
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			- 0 -
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			0%
	14	TYPE OF REPORTING PERSON
			IN

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	1	NAME OF REPORTING PERSON
			ROBERT H. YANKER
	2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP				(a) ☐
						(b) ☐
	3	SEC USE ONLY
	4	SOURCE OF FUNDS
	5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)				☐
	6	CITIZENSHIP OR PLACE OF ORGANIZATION
			USA
NUMBER OF			7	SOLE VOTING POWER
SHARES
BENEFICIALLY					- 0 -
OWNED BY			8	SHARED VOTING POWER
EACH
REPORTING					- 0 -
PERSON WITH			9	SOLE DISPOSITIVE POWER
					- 0 -
			10	SHARED DISPOSITIVE POWER
					- 0 -
	11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
			- 0 -
	12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
	13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
			0%
	14	TYPE OF REPORTING PERSON
			IN

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CUSIP No. 36164Y101

The following constitutes Amendment No. 2 to the Schedule 13D filed by the undersigned (“Amendment No. 2”). This Amendment No. 2 amends the Schedule 13D as specifically set forth herein.

Item 2. Identity and Background.

Item 2 is hereby amended and restated to read as follows:

(a)       This statement is filed by:

(i) Starboard Value and Opportunity Master Fund Ltd, a Cayman Islands exempted company (“Starboard V&O Fund”), with respect to the Shares directly and beneficially owned by it;

(ii) Starboard Value and Opportunity S LLC, a Delaware limited liability company (“Starboard S LLC”), with respect to the Shares directly and beneficially owned by it;

(iii) Starboard Value and Opportunity C LP, a Delaware limited partnership (“Starboard C LP”), with respect to the Shares directly and beneficially owned by it;

(iv) Starboard Value R LP (“Starboard R LP”), as the general partner of Starboard C LP;

(v) Starboard Value and Opportunity Master Fund L LP, a Cayman Islands exempted limited partnership (“Starboard L Master”), with respect to the Shares directly and beneficially owned by it;

(vi) Starboard Value L LP (“Starboard L GP”), as the general partner of Starboard L Master;

(vii) Starboard Value R GP LLC (“Starboard R GP”), as the general partner of Starboard R LP and Starboard L GP;

(viii) Starboard Value LP, as the investment manager of Starboard V&O Fund, Starboard C LP, Starboard L Master, and of a certain managed account (the “Starboard Value LP Account”) and the manager of Starboard S LLC;

(ix) Starboard Value GP LLC (“Starboard Value GP”), as the general partner of Starboard Value LP;

(x) Starboard Principal Co LP (“Principal Co”), as a member of Starboard Value GP;

(xi) Starboard Principal Co GP LLC (“Principal GP”), as the general partner of Principal Co;

(xii) Jeffrey C. Smith, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP;

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(xiii) Peter A. Feld, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP and as a nominee for the Board of Directors of the Issuer (the “Board”);

(xiv) Kevin W. Brown, as a nominee for the Board;

(xv) Janet P. Giesselman, as a nominee for the Board;

(xvi) Clay H. Kiefaber, as a nominee for the Board;

(xvii) Gavin T. Molinelli, as a nominee for the Board;

(xviii) Marran H. Ogilvie, as a nominee for the Board;

(xix) Andrew M. Ross, as a nominee for the Board;

(xx) Linda J. Welty, as a nominee for the Board; and

(xxi) Robert H. Yanker, as a nominee for the Board.

Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.” Each of the Reporting Persons is party to that certain Joint Filing and Solicitation Agreement, as further described in Item 6. Accordingly, the Reporting Persons are hereby filing a joint Schedule 13D.

(b)       The address of the principal office of each of Starboard S LLC, Starboard C LP, Starboard R LP, Starboard R GP, Starboard L GP, Starboard Value LP, Starboard Value GP, Principal Co, Principal GP, and Messrs. Smith and Feld is 777 Third Avenue, 18th Floor, New York, New York 10017. The address of the principal office of Starboard V&O Fund and Starboard L Master is Cayman Corporate Centre, 27 Hospital Road, George Town, Grand Cayman KYI-9008, Cayman Islands. The officers and directors of Starboard V&O Fund and their principal occupations and business addresses are set forth on Schedule A and are incorporated by reference in this Item 2. Mr. Brown’s principal business address is 5106 Tangle Lane, Houston, Texas 77056. Ms. Giesselman’s principal business address is 9580 NW Highway 225a, Ocala, Florida 34482. Mr. Kiefaber’s principal business address is 672 Monarch Crest Trail, Durango, Colorado 81301. Mr. Molinelli’s principal business address is c/o Starboard Value LP, 777 Third Avenue, 18th Floor, New York, New York 10017. Ms. Ogilvie does not currently have a principal business address. Mr. Ross’ principal business address is 720 Dorset Street, Charlotte, Vermont 05445. Ms. Welty’s principal business address is 1061 Hawthorne Heights, Greensboro, Georgia 30642. Mr. Yanker’s principal business address is 3505 Riverly Road, Atlanta, Georgia 30327.

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(c)       The principal business of Starboard V&O Fund is serving as a private investment fund.  Starboard V&O Fund has been formed for the purpose of making equity investments and, on occasion, taking an active role in the management of portfolio companies in order to enhance shareholder value. Starboard S LLC, Starboard C LP and Starboard L Master have been formed for the purpose of investing in securities and engaging in all related activities and transactions. Starboard Value LP provides investment advisory and management services and acts as the investment manager of Starboard V&O Fund, Starboard C LP, Starboard L Master and the Starboard Value LP Account and the manager of Starboard S LLC. The principal business of Starboard Value GP is providing a full range of investment advisory, pension advisory and management services and serving as the general partner of Starboard Value LP. The principal business of Principal Co is providing investment advisory and management services.  Principal Co is a member of Starboard Value GP.  Principal GP serves as the general partner of Principal Co.  Starboard R LP serves as the general partner of Starboard C LP. Starboard R GP serves as the general partner of Starboard R LP and Starboard L GP. Starboard L GP serves as the general partner of Starboard L Master. Messrs. Smith and Feld serve as members of Principal GP and the members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP. The principal occupation of Mr. Brown is serving as a member of the Board of Managers of JP3 Measurement, LLC. The principal occupation of Ms. Giesselman is serving as a member of the Boards of Directors of OMNOVA Solutions Inc., Twin Disc, Inc., Ag Growth International, Inc. and Avicanna Inc. The principal occupation of Mr. Kiefaber is serving as a member of the Issuer’s Board. The principal occupation of Mr. Molinelli is serving as Partner and Co-Portfolio Manager of Starboard Value LP. The principal occupation of Ms. Ogilvie is serving as a member of the Boards of Directors of Evolution Petroleum Corporation, Ferro Corporation, Four Corners Property Trust, Inc. and the Issuer. The principal occupation of Mr. Ross is serving as a member of the Board of Directors of Ferro Corporation. The principal occupation of Ms. Welty is serving as President and Chief Executive Officer of Welty Strategic Consulting, LLC. The principal occupation of Mr. Yanker is serving as Director Emeritus at McKinsey & Company.

(d)       No Reporting Person, nor any person listed on Schedule A to the Schedule 13D, annexed thereto, has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e)       No Reporting Person, nor any person listed on Schedule A to the Schedule 13D, annexed thereto, has, during the last five years, been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f)       Messrs. Smith, Feld, Brown, Kiefaber, Molinelli, Ross and Yanker and Mses. Giesselman, Ogilvie and Welty are citizens of the United States of America. The citizenship of the persons listed on Schedule A to the Schedule 13D is set forth therein.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by each of Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and held in the Starboard Value LP Account were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases. The aggregate purchase price of the 3,687,396 Shares beneficially owned by Starboard V&O Fund is approximately $90,852,521, excluding brokerage commissions. The aggregate purchase price of the 559,184 Shares beneficially owned by Starboard S LLC is approximately $13,980,392, excluding brokerage commissions. The aggregate purchase price of the 321,585 Shares beneficially owned by Starboard C LP is approximately $8,039,218, excluding brokerage commissions. The aggregate purchase price of the 268,223 Shares beneficially owned by Starboard L Master is approximately $6,469,404, excluding brokerage commissions. The aggregate purchase price of the 897,442 Shares held in the Starboard Value LP Account is approximately $22,260,192, excluding brokerage commissions.

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CUSIP No. 36164Y101

The Shares purchased by Mr. Brown were purchased with personal funds in the open market. The aggregate purchase price of the 815 Shares owned by Mr. Brown is approximately $19,992, excluding brokerage commissions.

The Shares purchased by Mr. Ross were purchased with personal funds in the open market. The aggregate purchase price of the 4,700 Shares owned by Mr. Ross is approximately $122,206, including brokerage commissions.

The 5,133 Shares beneficially owned by Mr. Kiefaber represent (i) 4,383 Shares issued to Mr. Kiefaber by the Issuer in connection with his service as a director of the Issuer pursuant to the Issuer’s non-employee director compensation program in partial payment of the 2018 and 2019 retainers and (ii) 750 Shares purchased by Mr. Kiefaber through the Clay Huston Kiefaber Trust, of which he is sole trustee, with personal funds in the open market. The aggregate purchase price of the 750 Shares purchased by Mr. Kiefaber is approximately $20,128, including brokerage commissions.

The 5,357 Shares beneficially owned by Ms. Ogilvie represent (i) 4,383 Shares issued to Ms. Ogilvie by the Issuer in connection with her service as a director of the Issuer pursuant to the Issuer’s non-employee director compensation program in partial payment of the 2018 and 2019 retainers and (ii) 974 Shares purchased by Ms. Ogilvie with personal funds in the open market. The aggregate purchase price of the 974 Shares purchased by Ms. Ogilvie is approximately $25,012, excluding brokerage commissions.

Item 4. Purpose of Transaction.

Item 4 is hereby amended to add the following:

On January 13, 2020, Starboard V&O Fund (together with its affiliates, “Starboard”) delivered a letter to the Issuer (the “Nomination Letter”) nominating a slate of nine highly qualified director candidates, including Kevin W. Brown, Peter A. Feld, Janet P. Giesselman, Clay H. Kiefaber, Gavin T. Molinelli, Marran H. Ogilvie, Andrew M. Ross, Linda J. Welty and Robert H. Yanker (collectively, the “Nominees”), for election to the Board at the Issuer’s 2020 annual meeting of stockholders (the “Annual Meeting”). As evidenced by their detailed biographies below, the Nominees have backgrounds spanning operations, finance, private equity, mergers and acquisitions, restructuring, strategic transformation, and public company governance. Starboard carefully selected this highly qualified slate of nominees who collectively have substantial and highly successful experience in the chemical, construction, and broader industrial industries and have decades of experience as CEOs, senior executives, chairmen and directors of well-performing industrial companies.

Also on January 13, 2020, Starboard delivered a letter to the Board, which, among other things, highlights the prolonged period of disappointing operating and financial results, poor corporate governance, and excessive executive compensation at the Issuer. While Starboard believes the Issuer has a strong product portfolio with differentiated capabilities and strong end market positioning, Starboard believes the Issuer needs a new plan, with improved execution and greatly enhanced Board oversight. The full text of the letter is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Kevin W. Brown is currently on the Board of Managers at JP3 Measurement, LLC, a gas identification and liquid analysis and sampling company, since November 2017. Previously, Mr. Brown served as Executive Vice President, Manufacturing & Refining and as a member of the Management Board of LyondellBasell Industries N.V. (NYSE:LYB) (“LyondellBasell”), a chemical company, from January 2015 until February 2017. Prior to that, he served as Senior Vice President, Refining for LyondellBasell from October 2009 through January 2015. Mr. Brown spent 22 years at Sinclair Oil Corporation (“Sinclair”), an American petroleum corporation, in various roles, including having served as the Executive and Senior Vice President of Operations, from 1994 to 2009, where he also served as a director from 2006 to 2009. From 1987 to 1994, Mr. Brown served as the Technical Manager, Operations Manager and Refinery Manager at Tulsa Oklahoma Refinery, a refinery. Additionally, Mr. Brown held a variety of positions at Texaco USA (n/k/a Texaco, Inc.), from 1981 to 1987. Additionally, Mr. Brown serves as a member of the Executive Advisory Council for RLG International, an international management-consulting firm, since April 2017 and has also served on an advisory board for W.R. Grace & Company (NYSE: GRA), a chemical conglomerate, since June 2017. Mr. Brown had previously served as Chairman of the National Petrochemical and Refiners Association (NPRA) (2008-2009), Vice Chairman of the NPRA (2008) and Member of the Executive Committee of NPRA and AFPM (NPRA renamed)(2005-2017). Mr. Brown also serves as Chairman of the Dean’s Advisory Council for College of Engineering and on the Campaign Arkansas Steering Committee at the University of Arkansas. Mr. Brown received his BSChE degree from the University of Arkansas.

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CUSIP No. 36164Y101

Peter A. Feld is a Managing Member and Head of Research of Starboard Value LP, a New York-based investment adviser with a focused and fundamental approach to investing primarily in publicly traded U.S. companies, a position he has held since April 2011. From November 2008 to April 2011, Mr. Feld served as a Managing Director of Ramius LLC and a Portfolio Manager of Ramius Value and Opportunity Master Fund Ltd. From February 2007 to November 2008, he served as a director at Ramius LLC. Mr. Feld currently serves as a member of the Board of Directors of each of AECOM (NYSE:ACM), a multinational infrastructure firm, since November 2019, Magellan Health, Inc. (NASDAQ: MGLN), a healthcare company, since March 2019 and NortonLifeLock Inc. (NASDAQ: NLOK) (f/k/a Symantec Corporation), a cybersecurity software and services company, since September 2018. He previously served as a member of the Board of Directors of each of Marvell Technology Group Ltd. (NASDAQ: MRVL), a leader in storage, networking and connectivity semiconductor solutions, from May 2016 to June 2018, The Brink’s Company (NYSE: BCO), a global leader in security-related services, from January 2016 to November 2017, Insperity, Inc. (NYSE: NSP), an industry-leading HR services provider, from March 2015 to June 2017, Darden Restaurants, Inc. (NYSE: DRI), a full-service restaurant company, from October 2014 to September 2015, Tessera Technologies, Inc. (formerly NASDAQ: TSRA) (n/k/a Xperi Corporation), a leading product and technology licensing company, from June 2013 to April 2014 and Integrated Device Technology, Inc. (NASDAQ: IDTI), a company that designs, develops, manufactures and markets a range of semiconductor solutions for the advanced communications, computing and consumer industries, from June 2012 to February 2014. Mr. Feld received a BA in Economics from Tufts University.

Janet P. Giesselman most recently served as an independent consultant with NH Enterprise, focusing on strategic planning and execution for companies with international growth objectives, from 2010 to May 2017. Prior to that, Ms. Giesselman held a number of senior leadership positions for The Dow Chemical Company (formerly NYSE: DOW), a global manufacturer of agriculture, energy, specialty and commodity chemicals, from 2001 to 2010, including Business Vice President of Dow Latex from 2006 to 2007 and President and General Manager of Dow Oil & Gas, from 2007 to 2010. From 1981 to 2001, Ms. Giesselman worked in a variety of sales, marketing and strategic planning roles at Rohm & Haas Company (formerly NYSE: ROH), a specialty and performance materials company, including Regional Business Director, Agricultural Division, from 1998 to 2001. Currently, Ms. Giesselman serves on the board of directors of each of OMNOVA Solutions Inc. (NYSE: OMN), a global provider of emulsion polymers, specialty chemicals and decorative & functional surfaces, since March 2015, Twin Disc, Inc. (NASDAQ: TWIN), a global provider of power transmissions for marine, oil & gas and industrial uses, since June 2015, Ag Growth International, Inc. (TSX: AFN), a leading manufacturer of grain handling, storage and conditioning equipment, since 2013, Avicanna Inc. (TSX: AVCN), a leader in innovative biopharmaceutical advances using cannabinoids, since June 2019 and McCain Foods, a privately held leading manufacturer of frozen french fries and potato specialties, since 2014. Previously, Ms. Giesselman served on the board of directors of a number of privately held companies and joint ventures, including Retirement Living Inc., Visionary Enterprise Inc., Michigan Surgery Investment Board, Solvay Americas, Indiana Pro Health Network, LLC, Dow Reichhold Spec, Indianapolis University Research Technology, ROHMID, LLC and F&R Agro. Ms. Giesselman received her B.S. in Biology from Pennsylvania State University and her M.S. in Plant Pathology from the University of Florida.

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Clay H. Kiefaber currently serves on the Board of the Issuer (NYSE: GCP), a leading global provider of construction products technologies, since March 2019. Previously, Mr. Kiefaber served as Special Assistant to the Secretary of Commerce: Finance and Budget from January 2017 until May 2017. Prior to that, he served as Interim CEO and on the Board of Directors for Premier Fixtures, a manufacturer that provides retail fixture solutions, from June 2016 to September 2016. Mr. Kiefaber served as President and CEO of Colfax Corporation (NYSE: CFX), a leading global manufacturer of gas and fluid-handling and fabrication technology (“Colfax”), from January 2010 to April 2012 and CEO of ESAB at Colfax, one of the world’s largest manufacturers of welding consumables, welding and cutting equipment and associated automation, from January 2012 to December 2016, following Colfax’s transformational acquisition of Charter International plc. Mr. Kiefaber also served on the Board of Directors of Colfax from May 2008 until August 2015. Prior to that, Mr. Kiefaber worked at Masco Corporation (NYSE: MAS), a manufacturer of products for home improvement and construction, in a variety of senior executive roles from 1989 until 2007, including Group President of architectural coatings and windows group from December 2005 to 2007. He also worked as a Senior Manager for Price Waterhouse (n/k/a PricewaterhouseCoopers), a multinational professional services network, from 1987 until 1989. Before that, Mr. Kiefaber worked as both a Corporate Manager and Materials Manager for Harris Corporation (NYSE: HRS), a technology company & defense contractor, from 1985 until 1987. Previously, Mr. Kiefaber had worked in sales at Digital Equipment Corporation, a leading vendor of computer systems, from 1981 to 1983, and then at Hewlett-Packard (NYSE: HPQ) (n/k/a HP Inc.), a multinational information technology company, from 1983 until 1985. Mr. Kiefaber received his Bachelor’s degree from Miami of Ohio and his MBA from the University of Colorado – Boulder.

Gavin T. Molinelli is a Partner and Co-Portfolio Manager of Starboard Value LP, a New York-based investment adviser with a focused and fundamental approach to investing primarily in publicly traded U.S. companies. Prior to Starboard Value LP’s formation in 2011, as part of the spin-off, Mr. Molinelli was a Director and an Investment Analyst at Ramius LLC for the funds that comprised the Value and Opportunity investment platform. Prior to joining Ramius LLC in October 2006, Mr. Molinelli was a member of the Technology Investment Banking group at Banc of America Securities LLC. Mr. Molinelli previously served on the Board of Directors of each of Forest City Realty Trust, Inc. (formerly NYSE: FCEA), a real estate investment trust, from April 2018 until its acquisition by Brookfield Asset Management Inc. (NYSE: BAM) in December 2018, Depomed, Inc. (n/k/a Assertio Therapeutics, Inc. (NASDAQ: ASRT)), a specialty pharmaceutical company, from March 2017 to August 2017 and Wausau Paper Corp. (formerly NYSE: WPP), a then leading provider of away from home towel and tissue products, from July 2014 until it was acquired by SCA Tissue North America LLC in January 2016. Mr. Molinelli also previously served on the Board of Directors of Actel Corporation (formerly NASDAQ: ACTL), a semi-conductor company. Mr. Molinelli received a B.A. in Economics from Washington and Lee University.

Marran H. Ogilvie currently serves on the Board of Directors of each of the Issuer (NYSE: GCP), a leading global provider of construction products technologies, since March 2019, Evolution Petroleum Corporation (NYSE:EPM), a developer and producer of oil and gas reserves, since December 2017, Ferro Corporation (NYSE:FOE), a supplier of functional coatings and color solutions, since October 2017 and Four Corners Property Trust, Inc. (NYSE:FCPT), a real estate investment trust that invests in restaurant properties in the U.S., since November 2015. Previously, Ms. Ogilvie served as an Advisor to the Creditors Committee for the Lehman Brothers International (Europe) Administration (the “Creditors Committee”) from June 2010 until July 2018, which assisted the Administrators in finding solutions to the significant issues affecting the estate.  She also previously served as a Representative of a Member of the Creditors Committee from January 2008 until June 2010. Ms. Ogilvie has also served on the Board of Directors of Bemis Company, Inc. (formerly NYSE: BMS), a global manufacturer of flexible packaging products and pressure sensitive materials, from March 2018 until it was acquired in June 2019, Forest City Realty Trust, Inc. (formerly NYSE: FCEA), a real estate investment trust that was later acquired, from April 2018 to December 2018, LSB Industries, Inc. (NYSE:LXU), a chemical manufacturing company, from April 2015 to April 2018, Seventy Seven Energy Inc. (formerly NYSE:SSE), an oil field services company that was later acquired, from July 2014 to July 2016, The Korea Fund, Inc. (NYSE:KF), an investment company that invests in Korean public equities, from November 2012 to December 2017, ZAIS Financial Corp. (formerly NYSE:ZFC)(n/k/a Sutherland Asset Management Corp.), a real estate investment trust, from February 2013 to October 2016, and Southwest Bancorp, Inc. (formerly NASDAQ:OKSB), a regional commercial bank that was later acquired (“Southwest”), from January 2012 to April 2015. She also previously served as Southwest’s Advisor from September 2011 to January 2012. Prior to that, Ms. Ogilvie was a member of Ramius, LLC, an investment management firm, where she served in various capacities from 1994 to 2009 before the firm’s merger with Cowen Group, Inc. (“Cowen Group”), including as Chief Operating Officer from 2007 to 2009 and General Counsel and Chief Compliance Officer from 1997 to 2007. Following the merger in 2009, Ms. Ogilvie became Chief of Staff at Cowen Group until 2010. Ms. Ogilvie received a Bachelor’s degree from the University of Oklahoma and a Juris Doctorate from St. John’s University School of Law.

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CUSIP No. 36164Y101

Andrew M. Ross has served on the Board of Directors of Ferro Corporation (NYSE:FOE), a producer of technology-based performance materials for manufacturers, since October 2016, where he serves as a member of its Audit and Governance & Nomination Committees. Previously, Mr. Ross was the Chief Executive Officer of Rolland-Fox Holdings, LLC, a producer of sustainable paper products, from January 2016 to March 2016. Prior to that, Mr. Ross served as an advisor to Huntsman Pigments and Additives (“Huntsman Pigments”)(f/k/a Rockwood Pigments), a primary manufacturer and processor of powder, liquid and granulated forms of color pigments including iron oxides, mixed-metal colors, transparent iron oxides, high heat-stable pigments, natural colors and corrosion inhibiting pigments, from October 2014 to December 2014. Mr. Ross is the former President of the Pigments and Additives business at Rockwood Holdings, Inc. (“Rockwood”)(formerly NYSE:ROC), a performance additives and titanium dioxide business, from January 2013 until its acquisition by Huntsman Pigments in October 2014. Mr. Ross joined Rockwood in 1990, and during his tenure he served in various management roles, including President of Color Pigments and Services from 2007 to 2010 and President of Performance Additives from 2010 to 2013. While at Rockwood, he led a number of initiatives that significantly increased sales and profitability of its color pigments business, including several multi-national acquisitions, acquisition integrations, and operational efficiency optimization projects. Prior to Rockwood, Mr. Ross worked in corporate finance at Smith Barney & Co. (n/k/a Morgan Stanley Wealth Management), a multinational financial services corporation from 1985 to 1987. Currently, he also serves as a director of Bartek Ingredients, Inc., a specialty chemical manufacturer serving food & beverage and industrial end markets, since November 2018. He also served as a director for Viance, LLC, a provider of an extensive range of advanced wood treatment technologies and services to the global wood preservation industry, from August 2010 until February 2014. Mr. Ross received his B.A. from Tufts University and his MBA from the Kellogg School of Management at Northwestern University. He also studied at the Institut d'Etudes Politiques in Paris.

Linda J. Welty currently serves as the President and Chief Executive Officer of Welty Strategic Consulting, LLC, an advisory firm focused on the development and execution of value creation strategies, since 2005. Previously, Ms. Welty was the President and Chief Operating Officer of Flint Ink Corp., the world’s second largest manufacturer of printing ink for publication and packaging, from 2003 to 2005. Prior to that, Ms. Welty was the President of the Specialty Group and member of the Executive Committee of H.B. Fuller Company (NYSE: FUL), a global manufacturer of adhesives, sealants and coatings, from 1998 to 2003. From 1977 to 1998, Ms. Welty served in a variety of global leadership roles for Hoechst AG, a global chemical provider, and its former U.S. subsidiary, Celanese (NYSE: CE). Currently, Ms. Welty serves on the board of directors at Mercer International, Inc. (NASDAQ: MERC), a global provider of sustainably-sourced forest products, bio-based renewable energy and chemicals, since June 2018. Previously, Ms. Welty served on the board of directors of Massey Energy (formerly NYSE: MEE), a mining company and coal extractor, from 2010 until its sale to Alpha Natural Resources in 2011. She also serves on the board of directors of Huber Engineered Materials, a portfolio company of privately-held J.M. Huber Corporation, a global manufacturer of engineered specialty ingredients. Previously, Ms. Welty served on the board of directors of Vertellus Specialties, Inc., a global manufacturer of specialty ingredients owned by private equity firm, Wind Point Partners, from 2007 to October 2016. In addition, she also served as Chairman of the Atlanta Chapter of the National Association of Corporate Directors from 2018 to 2019, as Vice-Chairman from 2015 to 2017, and Director from 2012 to 2019 whose mission is to advance excellence in corporate governance through world-class programs and leading boardroom practices and as a founding director of St. Mary’s Good Samaritan Hospital Foundation, which successfully raised philanthropic capital to construct an award-winning, state of the art hospital in rural Georgia. Ms. Welty holds a Bachelor of Science in Chemical Engineering from the University of Kansas.

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Robert H. Yanker has served as Director Emeritus at McKinsey & Company (“McKinsey”), a worldwide management consulting firm, since September 2013. Mr. Yanker served at McKinsey for 27 years, from 1986 to 2013, where he worked with a variety of clients in the industrial, consumer and telecommunications sectors on a full range of issues from strategy, portfolio assessment, sales and operations transformation, restructuring and capability building. He previously served as a director of Bemis Company, Inc. (formerly NYSE: BMS), a global manufacturer of flexible packaging products and pressure sensitive materials, from March 2018 until it was acquired in June 2019, Aaron’s Inc. (NYSE:AAN), a leading omnichannel provider of lease-purchase solutions, from May 2016 until May 2019, and Wausau Paper Corp. (formerly NYSE:WPP), a manufacturer of away-from-home towel and tissue products, from July 2015 until January 2016 when the company was acquired by a subsidiary of SCA Americas, Inc. Mr. Yanker received both his B.A. and his M.B.A. from Harvard University.

Starboard has engaged, and intends to continue to engage, in discussions with management and the Board of the Issuer regarding Board representation and the composition of the Issuer’s Board, generally.

Item 5. Interest in Securities of the Issuer.

Items 5(a) – (c) are hereby amended and restated to read as follows:

The aggregate percentage of Shares reported owned by each person named herein is based upon 72,685,612 Shares outstanding, as of November 1, 2019, which is the total number of Shares outstanding as reported in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 6, 2019.

A. Starboard V&O Fund

(a) As of the close of business on January 13, 2020, Starboard V&O Fund beneficially owned 3,687,396 Shares.

Percentage: Approximately 5.1%

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(b) 1. Sole power to vote or direct vote: 3,687,396
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 3,687,396
4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard V&O Fund during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

B. Starboard S LLC

(a) As of the close of business on January 13, 2020, Starboard S LLC beneficially owned 559,184 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 559,184
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 559,184
4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard S LLC during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

C. Starboard C LP

(a) As of the close of business on January 13, 2020, Starboard C LP beneficially owned 321,585 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 321,585
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 321,585
4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

D. Starboard R LP

(a) Starboard R LP, as the general partner of Starboard C LP, may be deemed the beneficial owner of the 321,585 shares owned by Starboard C LP.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 321,585
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 321,585
4. Shared power to dispose or direct the disposition: 0

(c) Starboard R LP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

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E. Starboard R GP

(a) Starboard R GP, as the general partner of Starboard R LP and Starboard L GP, may be deemed the beneficial owner of the (i) 321,585 shares owned by Starboard C LP and (ii) 268,223 Shares owned by Starboard L Master.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 589,808
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 589,808
4. Shared power to dispose or direct the disposition: 0

(c) Starboard R GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard C LP and Starboard L Master during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

F. Starboard L Master

(a) As of the close of business on January 13, 2020, Starboard L Master beneficially owned 268,223 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 268,223
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 268,223
4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard L Master during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

G. Starboard L GP

(a) Starboard L GP, as the general partner of Starboard L Master, may be deemed the beneficial owner of the 268,223 Shares owned by Starboard L Master.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 268,223
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 268,223
4. Shared power to dispose or direct the disposition: 0

(c) Starboard L GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of Starboard L Master during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

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CUSIP No. 36164Y101

H. Starboard Value LP

(a) As of the close of business on January 13, 2020, 897,442 Shares were held in the Starboard Value LP Account. Starboard Value LP, as the investment manager of Starboard V&O Fund, Starboard C LP, Starboard L Master, and the Starboard Value LP Account and the manager of Starboard S LLC, may be deemed the beneficial owner of the (i) 3,687,396 Shares owned by Starboard V&O Fund, (ii) 559,184 Shares owned by Starboard S LLC, (iii) 321,585 Shares owned by Starboard C LP, (iv) 268,223 Shares owned by Starboard L Master, and (v) 897,442 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.9%

(b) 1. Sole power to vote or direct vote: 5,733,830
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,733,830
4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard Value LP through the Starboard Value LP Account and on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard L Master during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

I. Starboard Value GP

(a) Starboard Value GP, as the general partner of Starboard Value LP, may be deemed the beneficial owner of the (i) 3,687,396 Shares owned by Starboard V&O Fund, (ii) 559,184 Shares owned by Starboard S LLC, (iii) 321,585 Shares owned by Starboard C LP, (iv) 268,223 Shares owned by Starboard L Master and (v) 897,442 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.9%

(b) 1. Sole power to vote or direct vote: 5,733,830
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,733,830
4. Shared power to dispose or direct the disposition: 0

(c) Starboard Value GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

J. Principal Co

(a) Principal Co, as a member of Starboard Value GP, may be deemed the beneficial owner of the (i) 3,687,396 Shares owned by Starboard V&O Fund, (ii) 559,184 Shares owned by Starboard S LLC, (iii) 321,585 Shares owned by Starboard C LP, (iv) 268,223 Shares owned by Starboard L Master and (v) 897,442 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.9%

(b) 1. Sole power to vote or direct vote: 5,733,830
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,733,830
4. Shared power to dispose or direct the disposition: 0

(c) Principal Co has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

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CUSIP No. 36164Y101

K. Principal GP

(a) Principal GP, as the general partner of Principal Co, may be deemed the beneficial owner of the (i) 3,687,396 Shares owned by Starboard V&O Fund, (ii) 559,184 Shares owned by Starboard S LLC, (iii) 321,585 Shares owned by Starboard C LP, (iv) 268,223 Shares owned by Starboard L Master and (v) 897,442 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.9%

(b) 1. Sole power to vote or direct vote: 5,733,830
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,733,830
4. Shared power to dispose or direct the disposition: 0

(c) Principal GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

L. Messrs. Smith and Feld

(a) Each of Messrs. Smith and Feld, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed the beneficial owner of the (i) 3,687,396 Shares owned by Starboard V&O Fund, (ii) 559,184 Shares owned by Starboard S LLC, (iii) 321,585 Shares owned by Starboard C LP, (iv) 268,223 Shares owned by Starboard L Master and (v) 897,442 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.9%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 5,733,830
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 5,733,830

(c) None of Messrs. Smith or Feld has entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference

M. Mr. Brown

(a) As of the close of business on January 13, 2020, Mr. Brown beneficially owned 815 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 815
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 815
4. Shared power to dispose or direct the disposition: 0

(c) Mr. Brown has not entered into any transactions in the Shares during the past sixty days.

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CUSIP No. 36164Y101

N. Ms. Giesselman

(a) As of the close of business on January 13, 2020, Ms. Giesselman did not own any Shares.

Percentage: 0%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 0

(c) Ms. Giesselman has not entered into any transactions in the Shares during the past sixty days.

O. Mr. Kiefaber

(a) As of the close of business on January 13, 2020, Mr. Kiefaber beneficially owned 5,133 Shares, which includes (i) 4,383 Shares issued to Mr. Kiefaber in connection with his service as a director of the Issuer pursuant to the Issuer’s non-employee director compensation program in partial payment of the 2018 and 2019 retainers and (ii) 750 Shares held in the Clay Huston Kiefaber Trust, of which he is sole trustee.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 5,133
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,133
4. Shared power to dispose or direct the disposition: 0

(c) Mr. Kiefaber has not entered into any transactions in the Shares during the past sixty days.

P. Mr. Molinelli

(a) As of the close of business on January 13, 2020, Mr. Molinelli did not own any Shares.

Percentage: 0%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 0

(c) Mr. Molinelli has not entered into any transactions in the Shares during the past sixty days.

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CUSIP No. 36164Y101

Q. Ms. Ogilvie

(a) As of the close of business on January 13, 2020, Ms. Ogilvie beneficially owned 5,357 Shares, including 4,383 Shares issued to Ms. Ogilvie in connection with her service as a director of the Issuer pursuant to the Issuer’s non-employee director compensation program in partial payment of the 2018 and 2019 retainers.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 5,357
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 5,357
4. Shared power to dispose or direct the disposition: 0

(c) Ms. Ogilvie has not entered into any transactions in the Shares during the past sixty days.

R. Mr. Ross

(a) As of the close of business on January 13, 2020, Mr. Ross beneficially owned 4,700 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 4,700
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 4,700
4. Shared power to dispose or direct the disposition: 0

(c) Mr. Ross has not entered into any transactions in the Shares during the past sixty days.

S. Ms. Welty

(a) As of the close of business on January 13, 2020, Ms. Welty did not own any Shares.

Percentage: 0%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 0

(c) Ms. Welty has not entered into any transactions in the Shares during the past sixty days.

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CUSIP No. 36164Y101

T. Mr. Yanker

(a) As of the close of business on January 13, 2020, Mr. Yanker did not own any Shares.

Percentage: 0%

(b) 1. Sole power to vote or direct vote: 0
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 0
4. Shared power to dispose or direct the disposition: 0

(c) Mr. Yanker has not entered into any transactions in the Shares during the past sixty days.

As of the close of business on January 13, 2020, the Reporting Persons collectively beneficially owned an aggregate of 5,749,835 Shares constituting approximately 7.9% of the Shares outstanding.

The filing of this Schedule 13D shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any securities of the Issuer that he, she or it does not directly own. Each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein that he, she or it does not directly own.

Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer. 

Item 6 is hereby amended to add the following:

On January 10, 2020, the Reporting Persons entered into a Joint Filing and Solicitation Agreement in which, among other things, (a) the Reporting Persons agreed to the joint filing on behalf of each of them of statements on Schedule 13D with respect to the securities of the Issuer, (b) the Reporting Persons agreed to solicit proxies or written consents for the election of the Nominees at the Annual Meeting (the “Solicitation”), and (c) Starboard V&O Fund, Starboard S LLC, Starboard C LP, Starboard L Master and Starboard Value LP through the Starboard Value Account agreed to bear all expenses incurred in connection with the Solicitation, including approved expenses incurred by any of the parties in connection with the Solicitation, subject to certain limitations. The Joint Filing and Solicitation Agreement is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Pursuant to letter agreements, Starboard V&O Fund and its affiliates have agreed to indemnify each of Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty against any and all claims of any nature arising from the Solicitation and any related transactions.   A form of the indemnification letter agreement is attached hereto as Exhibit 99.3 and is incorporated herein by reference.

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CUSIP No. 36164Y101

Pursuant to letter agreements, Starboard V&O Fund has agreed to compensate Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty for being named as and serving as Nominees for election as directors of the Issuer (the “Compensation Letter Agreements”). Under the Compensation Letter Agreements, Starboard V&O Fund has agreed to pay each of Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty (i) $25,000 in cash upon submission of the Nomination Letter to the Issuer and (ii) $25,000 in cash upon the filing of a definitive proxy statement with the Securities and Exchange Commission by Starboard Value LP or its affiliates relating to the Solicitation. Pursuant to the Compensation Letter Agreements, each of Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty agreed to use the after-tax proceeds from such compensation to acquire securities of the Issuer (the “Nominee Shares”) at such time that Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty shall determine but in any event no later than fourteen (14) days after receipt of such compensation, subject to Starboard’s right to waive the requirement to purchase the Nominee Shares. Pursuant to the Compensation Letter Agreements, each of Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty agreed not to sell, transfer or otherwise dispose of any Nominee Shares until the earliest to occur of (i) the Issuer’s appointment or nomination of such Nominee as a director of the Issuer, (ii) the date of any agreement with the Issuer in furtherance of such Nominee’s nomination or appointment as a director of the Issuer, (iii) Starboard’s withdrawal of its nomination of such Nominee for election as a director of the Issuer, and (iv) the date of the Annual Meeting; provided, however, in the event that the Issuer enters into a business combination with a third party, each of Messrs. Brown, Ross and Yanker and Mses. Giesselman and Welty may sell, transfer or exchange the Nominee Shares in accordance with the terms of such business combination.  A form of the Compensation Letter Agreement is attached hereto as Exhibit 99.4 and is incorporated herein by reference.

Other than as described herein, there are no contracts, arrangements, understandings or relationships among the Reporting Persons, or between the Reporting Persons and any other person, with respect to the securities of the Issuer.

Item 7. Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibits:

99.1       Letter to the Board of Directors, dated January 13, 2020.

99.2       Joint Filing and Solicitation Agreement by and among Starboard Value and Opportunity Master Fund Ltd, Starboard Value and Opportunity S LLC, Starboard Value and Opportunity C LP, Starboard Value and Opportunity Master Fund L LP, Starboard Value L LP, Starboard Value R LP, Starboard Value R GP LLC, Starboard Value LP, Starboard Value GP LLC, Starboard Principal Co LP, Starboard Principal Co GP LLC, Jeffrey C. Smith, Peter A. Feld, Kevin W. Brown, Janet P. Giesselman, Clay H. Kiefaber, Gavin T. Molinelli, Marran H. Ogilvie, Andrew M. Ross, Linda J. Welty and Robert H. Yanker, dated January 10, 2020.

99.3       Form of Indemnification Letter Agreement.

99.4       Form of Compensation Letter Agreement.

99.5       Powers of Attorney.

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CUSIP No. 36164Y101

SIGNATURES

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: January 13, 2020

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD By: Starboard Value LP, its investment manager   Starboard Value and Opportunity S LLC By: Starboard Value LP, its manager Starboard Value and Opportunity C LP By: Starboard Value R LP, its general partner   STARBOARD VALUE R LP By: Starboard Value R GP LLC, its general partner   Starboard Value and Opportunity Master Fund L LP By: Starboard Value L LP, its general partner     Starboard Value L LP By: Starboard Value R GP LLC, its general partner   STARBOARD VALUE LP By: Starboard Value GP LLC, its general partner   STARBOARD VALUE GP LLC By: Starboard Principal Co LP, its member   STARBOARD PRINCIPAL CO LP By: Starboard Principal Co GP LLC, its general partner   STARBOARD PRINCIPAL CO GP LLC   Starboard Value R GP LLC

By:	/s/ Jeffrey C. Smith
	Name:	Jeffrey C. Smith
	Title:	Authorized Signatory

/s/ Jeffrey C. Smith

Jeffrey C. Smith

Individually and as attorney-in-fact for Peter A. Feld, Kevin W. Brown, Janet P. Giesselman, Gavin T. Molinelli, Andrew M. Ross, Linda J. Welty and Robert H. Yanker

/s/ Clay H. Kiefaber

Clay H. Kiefaber

/s/ Marran H. Ogilvie

Marran H. Ogilvie

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SCHEDULE A

Transactions in the Shares During the Past Sixty Days

Nature of the Transaction Amount of Securities Purchased/(Sold) Price ($) Date of Purchase/Sale

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

Purchase of Common Stock	53,550	23.0083	01/07/2020
Purchase of Common Stock	53,550	23.0083	01/07/2020
Purchase of Common Stock	20,501	23.0894	01/08/2020
Purchase of Common Stock	20,501	23.0894	01/08/2020
Purchase of Common Stock	12,690	23.1543	01/09/2020
Purchase of Common Stock	12,690	23.1543	01/09/2020
Purchase of Common Stock	12,240	23.1642	01/10/2020
Purchase of Common Stock	12,240	23.1642	01/10/2020
Purchase of Common Stock	26,827	23.3529	01/10/2020
Purchase of Common Stock	26,826	23.3529	01/10/2020

STARBOARD VALUE AND OPPORTUNITY C LP

Purchase of Common Stock	10,150	23.0083	01/07/2020
Purchase of Common Stock	3,886	23.0894	01/08/2020
Purchase of Common Stock	2,405	23.1543	01/09/2020
Purchase of Common Stock	2,320	23.1642	01/10/2020
Purchase of Common Stock	5,085	23.3529	01/10/2020

STARBOARD VALUE AND OPPORTUNITY S LLC

Purchase of Common Stock	17,500	23.0083	01/07/2020
Purchase of Common Stock	6,700	23.0894	01/08/2020
Purchase of Common Stock	4,147	23.1543	01/09/2020
Purchase of Common Stock	4,000	23.1642	01/10/2020
Purchase of Common Stock	8,767	23.3529	01/10/2020

STARBOARD VALUE AND OPPORTUNITY MASTER FUND L LP

Purchase of Common Stock	9,800	23.0083	01/07/2020
Purchase of Common Stock	3,752	23.0894	01/08/2020
Purchase of Common Stock	2,322	23.1543	01/09/2020
Purchase of Common Stock	2,240	23.1642	01/10/2020
Purchase of Common Stock	4,909	23.3529	01/10/2020

CUSIP No. 36164Y101

STARBOARD VALUE LP

(Through the Starboard Value LP Account)

Purchase of Common Stock	30,450	23.0083	01/07/2020
Purchase of Common Stock	11,658	23.0894	01/08/2020
Purchase of Common Stock	7,216	23.1543	01/09/2020
Purchase of Common Stock	6,960	23.1642	01/10/2020
Purchase of Common Stock	15,254	23.3529	01/10/2020

EX-99.2

Exhibit 99.2

JOINT FILING AND SOLICITATION AGREEMENT

WHEREAS, certain of the undersigned are stockholders, direct or beneficial, of GCP Applied Technologies Inc., a Delaware corporation (the “Company”);

WHEREAS, Starboard Value and Opportunity Master Fund Ltd, a Cayman Islands exempted company (“Starboard V&O Fund”), Starboard Value and Opportunity S LLC, a Delaware limited liability company (“Starboard S LLC”), Starboard Value and Opportunity C LP, a Delaware limited partnership (“Starboard C LP”), Starboard Value R LP, a Delaware limited partnership, Starboard Value and Opportunity Master Fund L LP, a Cayman Islands exempted limited partnership (“Starboard L Master”), Starboard Value L LP, a Delaware limited partnership, Starboard Value R GP LLC, a Delaware limited liability company, Starboard Value LP, a Delaware limited partnership, Starboard Value GP LLC, a Delaware limited liability company, Starboard Principal Co LP, a Delaware limited partnership, Starboard Principal Co GP LLC, a Delaware limited liability company, Jeffrey C. Smith and Peter A. Feld (collectively, “Starboard”), Kevin W. Brown, Janet P. Giesselman, Clay H. Kiefaber, Gavin T. Molinelli, Marran H. Ogilvie, Andrew M. Ross, Linda J. Welty and Robert H. Yanker wish to form a group for the purpose of seeking representation on the Board of Directors of the Company (the “Board”) at the 2020 annual meeting of stockholders of the Company (including any other meeting of stockholders held in lieu thereof, and any adjournments, postponements, reschedulings or continuations thereof, the “Annual Meeting”) and for the purpose of taking all other action necessary to achieve the foregoing.

NOW, IT IS AGREED, this 10th day of January 2020 by the parties hereto:

1.       In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), each of the undersigned (collectively, the “Group”) agrees to the joint filing on behalf of each of them of statements on Schedule 13D, and any amendments thereto, with respect to the securities of the Company. Each member of the Group shall be responsible for the accuracy and completeness of his/her/its own disclosure therein, and is not responsible for the accuracy and completeness of the information concerning the other members, unless such member knows or has reason to know that such information is inaccurate.

2.       So long as this agreement is in effect, each of Messrs. Brown, Molinelli, Ross and Yanker and Mses. Giesselman and Welty shall provide written notice to Olshan Frome Wolosky LLP (“Olshan”) of (i) any of their purchases or sales of securities of the Company; or (ii) any securities of the Company over which they acquire or dispose of beneficial ownership. Notice shall be given no later than 24 hours after each such transaction.

3.       So long as this agreement is in effect, each of Messrs. Brown, Molinelli, Ross and Yanker and Mses. Giesselman and Welty agrees to provide Starboard advance written notice prior to effecting any purchase, sale, acquisition or disposal of any securities of the Company which he or she has, or would have, direct or indirect beneficial ownership so that Starboard has an opportunity to review the potential implications of any such transaction in the securities of the Company and pre-clear any such potential transaction in the securities of the Company by each of Messrs. Brown, Molinelli, Ross and Yanker and Mses. Giesselman and Welty. Each of each of Messrs. Brown, Molinelli, Ross and Yanker and Mses. Giesselman and Welty agrees that he or she shall not undertake or effect any purchase, sale, acquisition or disposal of any securities of the Company without the prior written consent of Starboard.

4.       Each of the undersigned agrees to form the Group for the purpose of (i) soliciting proxies or written consents for the election of the persons nominated by the Group to the Board at the Annual Meeting, (ii) taking such other actions as the parties deem advisable, and (iii) taking all other action necessary or advisable to achieve the foregoing; provided, however, that Starboard acknowledges that Mr. Kiefaber and Ms. Ogilvie, as current directors of the Company, have fiduciary obligations to the Company.

5.       Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard L Master shall have the right to pre-approve all expenses incurred in connection with the Group’s activities and agree to pay directly all such pre-approved expenses on a pro rata basis between Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard L Master based on the number of Shares in the aggregate beneficially owned by each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard L Master on the date hereof.

6.       Each of the undersigned agrees that any SEC filing, press release or stockholders communication proposed to be made or issued by the Group or any member of the Group in connection with the Group’s activities set forth in Section 4 shall be first approved by Starboard, or its representatives, which approval shall not be unreasonably withheld.

7.       The relationship of the parties hereto shall be limited to carrying on the business of the Group in accordance with the terms of this Agreement. Such relationship shall be construed and deemed to be for the sole and limited purpose of carrying on such business as described herein. Nothing herein shall be construed to authorize any party to act as an agent for any other party, or to create a joint venture or partnership, or to constitute an indemnification. Nothing herein shall restrict any party’s right to purchase or sell securities of the Company, as he/she/it deems appropriate, in his/her/its sole discretion, provided that all such sales are made in compliance with all applicable securities laws.

8.       This Agreement may be executed in counterparts, each of which shall be deemed an original and all of which, taken together, shall constitute but one and the same instrument, which may be sufficiently evidenced by one counterpart.

9.       In the event of any dispute arising out of the provisions of this Agreement or their investment in the Company, the parties hereto consent and submit to the exclusive jurisdiction of the Federal and State Courts in the State of New York.

10.       Any party hereto may terminate his/her/its obligations under this Agreement on 24 hours’ written notice to all other parties, with a copy by fax to Steve Wolosky at Olshan, Fax No. (212) 451-2222.

11.       Each party acknowledges that Olshan shall act as counsel for both the Group and Starboard and its affiliates relating to their investment in the Company.

12.       Each of the undersigned parties hereby agrees that this Agreement shall be filed as an exhibit to a Schedule 13D pursuant to Rule 13d-1(k)(1)(iii) under the Exchange Act.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the day and year first above written.

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD By: Starboard Value LP, its investment manager   Starboard Value and Opportunity S LLC By: Starboard Value LP, its manager Starboard Value and Opportunity C LP By: Starboard Value R LP, its general partner   STARBOARD VALUE R LP By: Starboard Value R GP LLC, its general partner   Starboard Value and Opportunity Master Fund L LP By: Starboard Value L LP, its general partner     Starboard Value L LP By: Starboard Value R GP LLC, its general partner   STARBOARD VALUE LP By: Starboard Value GP LLC, its general partner   STARBOARD VALUE GP LLC By: Starboard Principal Co LP, its member   STARBOARD PRINCIPAL CO LP By: Starboard Principal Co GP LLC, its general partner   STARBOARD PRINCIPAL CO GP LLC   Starboard Value R GP LLC

By:	/s/ Jeffrey C. Smith
	Name:	Jeffrey C. Smith
	Title:	Authorized Signatory

/s/ Jeffrey C. Smith

Jeffrey C. Smith

Individually and as attorney-in-fact for Peter A. Feld

/s/ Kevin W. Brown

Kevin w. brown

/s/ Janet p. Giesselman

janet p. giesselman

/s/ Clay H. Kiefaber

Clay H. kiefaber

/s/ Gavin t. Molinelli

gavin t. molinelli

/s/ Marran h. Ogilvie

marran h. ogilvie

/s/ Andrew m. Ross

Andrew m. ross

/s/ Linda j. Welty

Linda j. welty

/s/ Robert h. Yanker

robert h. yanker

EX-99.3

Exhibit 99.3

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

c/o Starboard Value LP

777 Third Avenue, 18^th Floor

New York, New York 10017

January __, 2020

_______________

_______________

_______________

Re: GCP Applied Technologies Inc.

Dear _______:

Thank you for agreeing to serve as a nominee for election to the Board of Directors of GCP Applied Technologies Inc. (the “Company”) in connection with the proxy solicitation that Starboard Value and Opportunity Master Fund Ltd and its affiliates (collectively, the “Starboard Group”) is considering undertaking to nominate and elect directors at the Company’s 2020 annual meeting of stockholders, or any other meeting of stockholders held in lieu thereof, and any adjournments, postponements, reschedulings or continuations thereof (the “Starboard Group Solicitation”). Your outstanding qualifications, we believe, will prove a valuable asset to the Company and all of its stockholders. This letter (“Agreement”) will set forth the terms of our agreement.

The members of the Starboard Group agree to jointly and severally indemnify and hold you harmless against any and all claims of any nature, whenever brought, arising from the Starboard Group Solicitation and any related transactions, irrespective of the outcome; provided, however, that you will not be entitled to indemnification for claims arising from your gross negligence, willful misconduct, intentional and material violations of law, criminal actions or material breach of the terms of this Agreement; provided further, that upon your becoming a director of the Company, this indemnification shall not apply to any claims made against you in your capacity as a director of the Company. This indemnification will include any and all losses, liabilities, damages, demands, claims, suits, actions, judgments, or causes of action, assessments, costs and expenses, including, without limitation, interest, penalties, reasonable attorneys’ fees, and any and all reasonable costs and expenses incurred in investigating, preparing or defending against any litigation, commenced or threatened, any civil, criminal, administrative or arbitration action, or any claim whatsoever, and any and all amounts paid in settlement of any claim or litigation asserted against, resulting, imposed upon, or incurred or suffered by you, directly or indirectly, as a result of or arising from the Starboard Group Solicitation and any related transactions (each, a “Loss”).

In the event you are notified or otherwise become aware of a claim against you pursuant to the prior paragraph or the occurrence of a Loss, you shall give the Starboard Group prompt written notice (including through electronic submission) of such claim or Loss (provided that failure to promptly notify the Starboard Group shall not relieve us from any liability which we may have on account of this Agreement, except to the extent we shall have been materially prejudiced by such failure). Upon receipt of such written notice, the Starboard Group will provide you with counsel to represent you. Such counsel shall be reasonably acceptable to you. In addition, you will be reimbursed promptly for all Losses suffered by you and as incurred as provided herein. The Starboard Group may not enter into any settlement of loss or claim without your consent unless such settlement includes a release of you from any and all liability in respect of such claim.

You hereby agree to keep confidential and not disclose to any party, without the consent of the Starboard Group, any confidential, proprietary or non-public information (collectively, “Information”) of the Starboard Group or its affiliates which you have heretofore obtained or may obtain in connection with your service as a nominee hereunder. Notwithstanding the foregoing, Information shall not include any information that is publicly disclosed by the Starboard Group or its affiliates or any information that you can demonstrate is now, or hereafter becomes, through no act or failure to act on your part, otherwise generally known to the public.

Notwithstanding the foregoing, if you are required by applicable law, rule, regulation or legal process to disclose any Information you may do so provided that you first promptly notify the Starboard Group so that the Starboard Group or any member thereof may seek a protective order or other appropriate remedy or, in the Starboard Group’s sole discretion, waive compliance with the terms of this Agreement. In the event that no such protective order or other remedy is obtained or the Starboard Group does not waive compliance with the terms of this Agreement, you may consult with counsel at the cost of the Starboard Group and you may furnish only that portion of the Information which you are advised by counsel is legally required to be so disclosed and you will request that the party(ies) receiving such Information maintain it as confidential.

All Information, all copies thereof, and any studies, notes, records, analysis, compilations or other documents prepared by you containing such Information, shall be and remain the property of the Starboard Group and, upon the request of a representative of the Starboard Group, all such Information shall be returned or, at the Starboard Group’s option, destroyed by you, with such destruction confirmed by you to the Starboard Group in writing.

This Agreement shall be governed by the laws of the State of New York, without regard to the principles of the conflicts of laws thereof.

* * *

If you agree to the foregoing terms, please sign below to indicate your acceptance. 

Very truly yours,

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

By: Starboard Value LP, its investment manager

By:

Name:

Title:

ACCEPTED AND AGREED:

________________________

EX-99.4

Exhibit 99.4

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

c/o Starboard Value LP

777 Third Avenue, 18^th Floor

New York, New York 10017

January __, 2020

____________

____________

____________

Dear _________:

This letter sets forth our mutual agreement with respect to compensation to be paid to you for your agreement to be named and serve as a nominee of a group of investors (the “Starboard Group”), including Starboard Value and Opportunity Master Fund Ltd, an affiliate of Starboard Value LP, for election as a director of GCP Applied Technologies Inc. (the “Company”) at the Company’s 2020 annual meeting of stockholders including any other meeting of stockholders held in lieu thereof, and any adjournments, postponements, reschedulings or continuations thereof (the “Annual Meeting”).

In consideration of your agreement to be named and serve as a nominee of the Starboard Group for election as a director of the Company at the Annual Meeting, the undersigned hereby agrees to pay you (i) $25,000 in cash upon the Starboard Group submitting a letter to the Company nominating you for election as a director of the Company (with such payment to be made as soon as reasonably practicable after you have been nominated) and (ii) $25,000 in cash upon the filing by the Starboard Group of a definitive proxy statement with the U.S. Securities and Exchange Commission relating to a solicitation of proxies in favor of your election as a director of the Company at the Annual Meeting. You hereby agree to use the after-tax proceeds from such compensation, or an equivalent amount of other funds, to acquire securities of the Company (the “Nominee Shares”) at such time that you shall determine, but in any event no later than fourteen (14) days after receipt of such compensation; provided, however, in the event you are unable to transact in the securities of the Company due to possession of material non-public information or any other limitation or restriction, you shall have fourteen (14) days from the first date that you can transact in the securities of the Company to acquire such securities; provided, further, that the Starboard Group shall have the right to waive the requirement to purchase Nominee Shares at any time by providing you with prior notice of any such waiver. During the term of this letter agreement, you agree not to sell, transfer or otherwise dispose of any Nominee Shares; provided, however, in the event that the Company enters into a business combination with a third party, you may sell, transfer or exchange the Nominee Shares in accordance with the terms of such business combination.

The term of this letter agreement shall commence on the date hereof and shall remain in effect until the earliest to occur of (i) the Company’s appointment or nomination of you for election as a director of the Company, (ii) the date of any agreement with the Company in furtherance of your nomination or appointment as a director of the Company, (iii) the Starboard Group’s withdrawal of your nomination for election as a director of the Company, and (iv) the date of the Annual Meeting.

The validity, interpretation, construction and performance of this letter agreement shall be governed by the laws of the State of New York, without regard to its principles of conflict of laws, and by applicable laws of the United States. The parties hereto consent to the jurisdiction of the New York State and United States courts located in New York County, New York for the resolution of any disputes hereunder and agree that venue shall be proper in any such court notwithstanding any principle of forum non conveniens and that service of process on the parties hereto in any proceeding in any such court may be effected in the manner provided herein for the giving of notices. The parties hereto waive trial by jury in respect of any such proceeding.

This letter agreement shall bind and inure to the benefit of you and your heirs, successors and assigns.

This letter agreement may be executed in counterparts, each of which shall be deemed an original, and all of which, taken together, shall constitute one and the same instrument.

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

By: Starboard Value LP, its investment manager

By:

Name:

Title:

Accepted and Agreed to:

______________________

EX-99.5

Exhibit 99.5

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act. Prior to executing or filing any document or acting on behalf of the undersigned as provided herein, the attorney-in-fact shall use its commercially reasonable efforts to notify the undersigned and if applicable, provide a copy to the undersigned. After executing or filing any documents on behalf of the undersigned as provided herein, the attorney-in-fact shall use its commercially reasonable efforts to provide a copy of such executed or filed document to the undersigned.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Kevin W. Brown

Kevin W. Brown

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Janet p. Giesselman

janet p. giesselman

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Gavin T. Molinelli

gavin t. molinelli

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Andrew m. Ross

andrew m. Ross

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Linda J. Welty

linda j. welty

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints Jeffrey C. Smith and Peter A. Feld, or either of them, the undersigned’s true and lawful attorney-in-fact to take any and all action in connection with (i) the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of GCP Applied Technologies Inc. (the “Company”) directly or indirectly beneficially owned by Starboard Value LP or any of its affiliates (collectively, the “Starboard Group”) and (ii) any proxy solicitation of the Starboard Group to elect the Starboard Group’s slate of director nominees to the board of directors of the Company at the 2020 annual meeting of stockholders of the Company (the “Solicitation”). Such action shall include, but not be limited to:

1.executing for and on behalf of the undersigned any Schedule 13D, and amendments thereto, filed by the Starboard Group that are required to be filed under Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

2.executing for and on behalf of the undersigned all Forms 3, 4 and 5 required to be filed under Section 16(a) of the Exchange Act and the rules thereunder in connection with the undersigned’s beneficial ownership of, or participation in a group with respect to, securities of the Company or the Solicitation;

3.executing for and on behalf of the undersigned all Joint Filing and Solicitation Agreements or similar documents pursuant to which the undersigned shall agree to be a member of the Starboard Group;

4.performing any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such document, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

5.taking any other action of any type whatsoever in connection with the Solicitation, including entering into any settlement agreement, that in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Section 13(d), Section 16 or Section 14 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer a member of the Starboard Group unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10th day of January 2020.

/s/ Robert H. Yanker

Robert h. yanker