| Abbreviation | Definition |
|---|---|
| GAR | Grand Army of the Republic |
| GARC | Global Alliance for Rabies Control |
| GARP | Greek Association of Retired People |
| GART | Golden Valley Agricultural Research Trust |
| GASD | Gujarati Association Of San Diego |
| GASF | Great American Station Foundation |
| GASP | Geriatric Asbestos Survivers Partnership |
| GASP | Grandmothers Act to Save the Planet |
| GASP | Great Ape Survival Project |
| GASP | Group Against Smoking in Public |
| GASP | Group To Alleviate Smoking Pollution |
| GAWF | Grant- A- Wish Foundation |
| GAWFI | Grant- A- Wish Foundation, Inc. |
| GB | Guild Board |
| GBAA | Georgia Bowhunter and Archery Association |
| GBBL | Geordie Blood Bowl League |
| GBFB | Greater Boston Food Bank |
| GBGLF | Georgian Bay Great Lakes Foundation |
| GBHP | Grizzly Bear Habitat Plan |
| GBNA | Gay Birders of North America |