GSA
- Army Special Forces Brigade
- Citroën GSA
- European GNSS Agency
- GNAS complex locus
- Gaiety School of Acting
- GameSpy Arcade
- Gaudineer Scenic Area
- Gaye Su Akyol
- Gay–straight alliance
- General Services Administration
- General sales agent
- General somatic afferent fibers
- Genetic sexual attraction
- Genetics Society of America
- Geological Society of America
- Geological Society of Australia
- George Stevens Academy
- German School of Athens
- German Studies Association
- Gerontological Society of America
- Ghana Standards Authority
- Girl Scouts of America
- Girls' Schools Association
- Gitam School of Architecture
- Glasgow School of Art
- Global Arrangement on Sustainable Steel and Aluminum
- Global Sourcing Association
- Global Storage Architecture
- Global mobile Suppliers Association
- Goan Sports Association
- Google Search Appliance
- Gordon Stanfield Animation
- Governor's School for the Arts (Kentucky)
- Graduate student assistant
- Graduate student association
- Green Schools Alliance
- Guildford School of Acting
- Guyana School of Agriculture
- Long Pasia Airport