EX-32.1 6 dex321.htm 906 CERTIFICATION - CHIEF EXECUTIVE OFFICER 906 Certification - Chief Executive Officer

Exhibit 32.1

CERTIFICATION

In connection with the Annual Report of Graham Packaging Holdings Company on Form 10-K for the year ended December 31, 2007 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Warren D. Knowlton, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act of 2002, that:

 

  1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

 

  2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Graham Packaging Holdings Company.

Date: March 31, 2008

 

By:  

/s/    WARREN D. KNOWLTON        

  Warren D. Knowlton
  Chief Executive Officer

The foregoing certification is being furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Section 1350 of Chapter 63 of Title 18 of the United States Code) and is not being filed as part of the Report or as a separate disclosure document.