| Abbreviation | Definition |
|---|---|
| GCCI | Global Communications for the Conservation, Inc. |
| GCCN | Get Child Care NOW |
| GCCR | Greater Chicago Cavalier Rescue |
| GCCW | Georgian Center for the Conservation of Wildlife |
| GCF | Grace Children's Foundation |
| GCFB | Gleaners Community Food Bank |
| GCFCCC | Great Commission Foundation of Campus Crusade for Christ |
| GCFCCCI | Great Commission Foundation of Campus Crusade for Christ, International |
| GCFD | Greater Chicago Food Depository |
| GCLB | Genesee County Land Bank |
| GCLB | Guidance Centre - Long Beach |
| GCMI | Great Commission Ministries Interrenational, Inc. |
| GCPA | Gloucestershire Care Providers Association |
| GCSA | Golf Course Superintendents Association |
| GCSI | Genesis Creation Science Institute |
| GCWW | Gilda's Club WorldWide |
| GD | Great Dads |
| GDA | Guide Dogs of America |
| GDAB | Guide Dogs Association of the Blind |
| GDAF | Guide Dogs of America Foundation |