| Abbreviation | Definition |
|---|---|
| GROW | Grand Rapids Opportunities For Women |
| GRP | Grasslands Restoration Project |
| GRSP | Ghazni Rural Support Programme |
| GRSP | Gualala River Steelhead Project |
| GRT | Gypsy, Roma and Traveller |
| GRTU | Guadalupe River Trout Unlimited |
| GS | Guild Statistics |
| GSA | Gay Straight Alliance |
| GSA | Global mobile Suppliers Association |
| GSBS | Garden State Bible School |
| GSC | Global Sourcing Council |
| GSF | The Gwendolyn Strong Foundation |
| GSHVC | Girl Scouts of the Huron Valley Council |
| GSID | Global Solutions for Infectious Diseases |
| GSMA | Golf Sports Medicine Association |
| GSMD | Girl Scouts of Metropolitan Detroit |
| GSMS | Great Smoky Mountains Study |
| GSO | Gram Schmidt Orthogonalization |
| GSOC | Geological Society of the Oregon Country |
| GSOD | Greyhound Scream of Death |