GSF may refer to:
Gamlakarleby Segelförening, a Finnish yacht club Gang Suppression Force, international anti-gang force in Haiti Generic sensor format, used for storing bathymetry data Genoa Social Forum Georgia Southern and Florida Railway Glasgow Science Festival Global Sanitation Fund GlobalSantaFe Corporation, a defunct American offshore oil and gas company Global Strategy Forum Global Sumud Flotilla, an attempt to break the Israeli blockade of the Gaza Strip Golden State Foods, an American food service company Golden Star Ferries, Greek ferry operator GoSports Foundation Grand slam force, in contract bridge Grieg Seafood, a Norwegian seafood company Suzuki Bandit series, a series of motorcycles