| Abbreviation | Definition |
|---|---|
| GAA | General Appropriations Act [Massachusetts] |
| GAAAA | Georgia Alliance of African American Attorneys |
| GAAP | Greater Access to Affordable Pharmaceuticals Act of 2003 fiscal year |
| GAAR | General Anti-Abuse Rule (UK) |
| GAAT | Guardianship and Administration Tribunal (Australia) |
| GAB | Good Against Bad |
| GAC | Ground Assault Convoy |
| GAC | Guilty As Charged |
| GACE | Georgia Association of Code Enforcement |
| GAIB | Ground Accident Investigation Board |
| GAL | Guardian At Large |
| GALLOP | Gay and Lesbian Lawyers of Philadelphia |
| GAPB | Georgia Association of Professional Bondsmen |
| GARA | General Aviation Revitalization Act |
| GARP | Generic Attribute Registration Protocol |
| GAS | Gang Anti-Social |
| GASA | Greeks Against Sexual Assault |
| GASI | General Agency for Specialized Investigation |
| GAU | Ground Assault Unit |
| GAWL | Georgia Association for Women Lawyers |