Cusip No. 36466D102 13G Page 7 of 8 Pages
EXHIBIT 1 TO SCHEDULE 13G
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SEPTEMBER 8, 2000
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MORGAN STANLEY DEAN WITTER & CO. AND MORGAN STANLEY DEAN WITTER
ADVISORS INC. hereby agree that, unless differentiated, this
Schedule 13G is filed on behalf of each of the parties.
MORGAN STANLEY DEAN WITTER & CO.
BY: /s/ Dennine Bullard
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Dennine Bullard / Morgan Stanley & Co. Incorporated
MORGAN STANLEY DEAN WITTER ADVISORS INC.
BY: /s/ James Wallin
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James Wallin / Senior Vice President Morgan Stanley Dean Witter
Advisors Inc.
