497

EXPLANATORY NOTE

The XBRL interactive data file included as an exhibit to this filing relates to the Supplement dated November 13, 2012 to the GMO Risk Premium Fund Prospectus dated September 25, 2012 filed with the Securities and Exchange Commission on November 13, 2012 under Rule 497(e) (SEC Accession No. 0001193125-12-467187).

EXHIBIT INDEX

GMO TRUST

Exhibit Ref.	Title of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Schema Document
EX-101.CAL	XBRL Calculation Linkbase Document
EX.101.LAB	XBRL Labels Linkbase Document
EX-101.PRE	XBRL Presentation Linkbase Document
EX.101.DEF	XBRL Definition Linkbase Document

XML

GMO TRUST

Supplement dated November 13, 2012 to the

GMO Risk Premium Fund Prospectus dated September 25, 2012

GMO Risk Premium Fund

Effective November 13, 2012, the Fund charges a purchase premium of 0.15% of the amount invested and a redemption fee of 0.15% of the amount redeemed. Immediately prior to November 13, 2012, the Fund charged a purchase premium of 0.25% and a redemption fee of 0.25%. The section captioned "Shareholder fees" on page 1 of the Prospectus is replaced with the following:

Shareholder fees

(fees paid directly from your investment)

	Class III			Class IV			Class V			Class VI
Purchase premium (as a percentage of amount invested)		0.15	%		0.15	%		0.15	%		0.15	%
Redemption fee (as a percentage of amount redeemed)		0.15	%		0.15	%		0.15	%		0.15	%

In addition, the section captioned "Example" on pages 1-2 is replaced with the following:

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same as those shown in the table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	If you sell your shares				If you do not sell your shares
	1 Year		3 Years		1 Year		3 Years
Class III	$	152	$	409	$	136	$	392
Class IV	$	147	$	393	$	131	$	377
Class V	$	146	$	390	$	130	$	374
Class VI	$	143	$	381	$	127	$	364

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

GMO TRUST

Prospectus Date

rr_ProspectusDate

Sep. 25, 2012

Supplement [Text Block]

gmot4_SupplementTextBlock

GMO TRUST

Supplement dated November 13, 2012 to the

GMO Risk Premium Fund Prospectus dated September 25, 2012

GMO Risk Premium Fund

Effective November 13, 2012, the Fund charges a purchase premium of 0.15% of the amount invested and a redemption fee of 0.15% of the amount redeemed. Immediately prior to November 13, 2012, the Fund charged a purchase premium of 0.25% and a redemption fee of 0.25%. The section captioned "Shareholder fees" on page 1 of the Prospectus is replaced with the following:

Shareholder fees

(fees paid directly from your investment)

	Class III			Class IV			Class V			Class VI
Purchase premium (as a percentage of amount invested)		0.15	%		0.15	%		0.15	%		0.15	%
Redemption fee (as a percentage of amount redeemed)		0.15	%		0.15	%		0.15	%		0.15	%

In addition, the section captioned "Example" on pages 1-2 is replaced with the following:

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same as those shown in the table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	If you sell your shares				If you do not sell your shares
	1 Year		3 Years		1 Year		3 Years
Class III	$	152	$	409	$	136	$	392
Class IV	$	147	$	393	$	131	$	377
Class V	$	146	$	390	$	130	$	374
Class VI	$	143	$	381	$	127	$	364

GMO Risk Premium Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

gmot4_SupplementTextBlock

GMO TRUST

Supplement dated November 13, 2012 to the

GMO Risk Premium Fund Prospectus dated September 25, 2012

GMO Risk Premium Fund

Effective November 13, 2012, the Fund charges a purchase premium of 0.15% of the amount invested and a redemption fee of 0.15% of the amount redeemed. Immediately prior to November 13, 2012, the Fund charged a purchase premium of 0.25% and a redemption fee of 0.25%. The section captioned "Shareholder fees" on page 1 of the Prospectus is replaced with the following:

Shareholder fees

(fees paid directly from your investment)

	Class III			Class IV			Class V			Class VI
Purchase premium (as a percentage of amount invested)		0.15	%		0.15	%		0.15	%		0.15	%
Redemption fee (as a percentage of amount redeemed)		0.15	%		0.15	%		0.15	%		0.15	%

In addition, the section captioned "Example" on pages 1-2 is replaced with the following:

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same as those shown in the table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	If you sell your shares				If you do not sell your shares
	1 Year		3 Years		1 Year		3 Years
Class III	$	152	$	409	$	136	$	392
Class IV	$	147	$	393	$	131	$	377
Class V	$	146	$	390	$	130	$	374
Class VI	$	143	$	381	$	127	$	364

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees
(fees paid directly from your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

              This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same as those shown in the table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If you sell your shares

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If you do not sell your shares

GMO Risk Premium Fund | Class III

Risk/Return:

rr_RiskReturnAbstract

Purchase premium (as a percentage of amount invested)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

0.15%

Redemption fee (as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

0.15%

1 Year

rr_ExpenseExampleYear01

152

3 Years

rr_ExpenseExampleYear03

409

1 Year

rr_ExpenseExampleNoRedemptionYear01

136

3 Years

rr_ExpenseExampleNoRedemptionYear03

392

GMO Risk Premium Fund | Class IV

Risk/Return:

rr_RiskReturnAbstract

Purchase premium (as a percentage of amount invested)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

0.15%

Redemption fee (as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

0.15%

1 Year

rr_ExpenseExampleYear01

147

3 Years

rr_ExpenseExampleYear03

393

1 Year

rr_ExpenseExampleNoRedemptionYear01

131

3 Years

rr_ExpenseExampleNoRedemptionYear03

377

GMO Risk Premium Fund | Class V

Risk/Return:

rr_RiskReturnAbstract

Purchase premium (as a percentage of amount invested)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

0.15%

Redemption fee (as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

0.15%

1 Year

rr_ExpenseExampleYear01

146

3 Years

rr_ExpenseExampleYear03

390

1 Year

rr_ExpenseExampleNoRedemptionYear01

130

3 Years

rr_ExpenseExampleNoRedemptionYear03

374

GMO Risk Premium Fund | Class VI

Risk/Return:

rr_RiskReturnAbstract

Purchase premium (as a percentage of amount invested)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

0.15%

Redemption fee (as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

0.15%

1 Year

rr_ExpenseExampleYear01

143

3 Years

rr_ExpenseExampleYear03

381

1 Year

rr_ExpenseExampleNoRedemptionYear01

127

3 Years

rr_ExpenseExampleNoRedemptionYear03

364

XML

Document and Entity Information	12 Months Ended
	Sep. 25, 2012
Risk/Return:
Document Type	Other
Document Period End Date	Nov. 13, 2012
Registrant Name	GMO TRUST
Central Index Key	0000772129
Amendment Flag	false
Document Creation Date	Nov. 13, 2012
Document Effective Date	Nov. 13, 2012
Prospectus Date	Sep. 25, 2012

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	GMO TRUST
Prospectus Date	rr_ProspectusDate	Sep. 25, 2012
Document Creation Date	dei_DocumentCreationDate	Nov. 13, 2012