GSG

GSG may refer to:

Businesses

 * German Sport Guns GmbH, a German firearms manufacturer

Government

 * Government Statistician Group, a community of government statisticians in the UK
 * GSG 9, a German counter-terrorism and special operations unit

Other organizations

 * Global Scenario Group, an environmental research organization
 * Global Strategy Group, an American public affairs and research firm
 * Grampian Speleological Group, a caving organisation, based in Scotland
 * Great Southern Grammar, a school in rural Western Australia
 * Grove Street Games, a video game developer

Other uses

 * German Sign Language (ISO 639-3 language code)
 * The Good Schools Guide, a British guide to schools
 * Grand strategy game, a genre of board games and video games