GSA may stand for:
- Gale-Shapley Algorithm
- Game Spy Arcade (game utility)
- GameSpy Arcade (gaming service)
- Gaming Standards Association
- Gamma Sigma Alpha
- Garden Seed Association
- Garden State Academy (New Jersey)
- Gay-Straight Alliance Network
- General sales agent
- General Services Administration (US, gsa.gov)
- General somatic afferent (nerve)
- Genetic sexual attraction
- Genetics Society of America
- Genetics Society of Australia
- Geological Society of America
- Geological Society of Australia (gsa.org.au)
- Georgia Securities Association
- Georgia Shrimp Association
- Georgia Society of Anesthesiologists
- Georgia Sociological Association
- Georgia Strait Alliance
- German Studies Association
- Gerontological Society of America
- Girl Scouts of America
- Girls’ Schools Association (UK)
- Glasgow School of Art (gsa.ac.uk)
- Global Sports Alliance (Japan, gsa.or.jp)
- Goethe- und Schiller-Archiv
- Good Shepherd Academy
- Google Search Appliance
- Graduate student association
- Greater Shadow Amuli (Asheron's Call)
- Grover Search Algorithm
- Guam Society of America