| Abbreviation | Definition |
|---|---|
| GAOG | Guyana Association of Georgia |
| GAOK | Governors Association Of Korea |
| GAOSA | Geidam Academy Old Students Association |
| GAP | Golf Association of Philadelphia |
| GAPA | Gerstell Academy Parents Association |
| GAPA | Greenwich Academy Parents Association |
| GAPE | Global Association for People and the Environment |
| GAPPA | Georgia Association of Physical Plant Administrators |
| GAPS | Georgia Association of Personnel Services |
| GAPSA | Graduate and Professional Student Association |
| GAPSA | Graduate Association for Professionals in Student Affairs |
| GAPT | Georgia Association For Play Therapy |
| GARA | Greeley Area Realtor Association |
| GARA | Greensboro Amateur Radio Association |
| GARB | General Association of Regular Baptists |
| GARC | Georgia Association of Regional Commissions |
| GARMA | Gettysburg Area Retail Merchants Association |
| GARR | Georgia Association of Recovery Residences |
| GASA | German American School Association |
| GASA | Guardian Angel Settlement Association |