Gap Customer Service Phone Numbers Customer service: 1-800-427-7895   Gap Headquarters Info, Email, Phone number, Website and live chat Information Founded: August 21, 1969; 48 years ago San Francisco, California, U.S. Founder: Donald Fisher Doris F. Fisher Headquarters: San Francisco, California, U.S. Number of locations: 3,594 (Q4 2017), 2,372 (US, 2017) Area served: Worldwide   If you