GSM is the Global System for Mobile communications, a standard for networking mobile devices such as mobile telephones.

GSM may also refer to:

• GSM London, a higher education provider in England
• Guildhall School of Music and Drama, formerly Guildhall School of Music, England
• Graduate Studies in Mathematics, textbooks by the American Mathematical Society

• Garrison sergeant major, in the British Army
• General Service Medal (disambiguation), several campaign medals
• Gas turbine system technician (mechanical), a U.S. Navy rating

• Glass Sport Motors, a former South African car company
• Flyglobespan (ICAO airline code), a former airline based in Scotland
• Ginebra San Miguel, a subsidiary of San Miguel Corporation
• Xanh SM, or GSM (Green and Smart Mobility), a taxi company in Vietnam

• Church of St Mary the Great, Cambridge or Great St Mary's, England
• Qeshm International Airport (IATA code), Qeshm Island, Iran
• Għajnsielem (postcode), Gozo, Malta

• Genitourinary syndrome of menopause
• Grams per square metre (non-standard for g/m²), a measure of paper density or grammage
• Grams per square metre (g/m²), a measure of thermal insulation for example sleeping bags; see Tog (unit)
• Grenache, Syrah, Mourvèdre, blends in Rhône wine and Australian wine
• Gender and Sexual Minorities, an alternative term to LGBT
• Guatemalan Sign Language (ISO 639 language code: gsm)

• All pages with titles containing GSM