| Abbreviation | Definition |
|---|---|
| GOMRI | Gulf of Mexico Research Initiative |
| GOPA | Greek Orthodox Patriarchate of Antioch and all the East |
| GOSF | Gift Of Sight Foundation |
| GOSF | Gladys Okwesili Scholarship Fund |
| GPAD | Great Plains Assistance Dogs |
| GPADF | Great Plains Assistance Dogs Foundation |
| GPADFI | Great Plains Assistance Dogs Foundation, Inc. |
| GPCF | Greater Peoria Chess Foundation |
| GPD | Great Plains Dogs |
| GPPAC | Global Partnership for the Prevention of Armed Conflict |
| GPWM | Grosse Pointe War Memorial |
| GRAP | General Relief Advocacy Project |
| GRAPE | Grand Rapids Area Professionals for Excellence |
| GRASP | Greece Residents Assisting Stray Pets |
| GRC | German Red Cross |
| GRF | Gilani Research Foundation |
| GRF | Glaucoma Research Foundation |
| GRN | Gulf Restoration Network |
| GRNC | Grass Roots North Carolina |
| GROW | Gathering And Reaching Our Women |