| Abbreviation | Definition |
|---|---|
| GCPS | Granville County Public Schools |
| GCQA | Gibson County Quality Assurance |
| GCR | Grand County Road |
| GCRD | Gem County Recreation Disctrict |
| GCRD | Gem County Recreation District |
| GCRD | Greenville County Recreation District |
| GCRTA | Grayson County Retired Teachers Association |
| GCRW | Gallatin County Republican Women |
| GCRW | Gillespie County Republican Women |
| GCRW | Guadalupe County Republican Women |
| GCS | Granville County Schools |
| GCS | Greenville County Schools |
| GCSAR | Grand County Search And Rescue |
| GCSAR | Grant County Search And Rescue |
| GCSO | Galveston County Sheriff Office |
| GCSO | Gilchrist County Sheriff's Office |
| GCSO | Graham County Sheriff's Office |
| GCSO | Greenville County Sheriff's Office |
| GCT | Greene County Tech |
| GCT | Greene County Transit |