EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS
ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Richard L. Marcantonio, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of G&K Services, Inc.;

2.    Based on my knowledge, this quarterly report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements made, in light of circumstances under which such
      statements were made, not misleading with respect to the period covered by
      this quarterly report; and

3.    Based on my knowledge, the financial statements, and other financial
      information included in this quarterly report, fairly present in all
      material respects the financial condition, results of operations and cash
      flows of the registrant as of, and for, the periods presented in this
      quarterly report.

Date: February 8, 2005

                                      By: /s/ Richard L. Marcantonio
                                          -------------------------------------
                                          Richard L. Marcantonio
                                          President and Chief Executive Officer
                                          (Principal Executive Officer)