| Abbreviation | Definition |
|---|---|
| GCWC | Granite City Wrestling Club |
| GDBC | Georgina Dragon Boat Club |
| GDBC | Glenmaggie and District Boat Club |
| GDBC | Gobindagonj DABALOY Biggan Club |
| GDBC | Guernsey Dinner Boxing Club |
| GDC | Girls DJ Club |
| GDCC | Glenelg District Cricket Club |
| GDCC | Gordon District Cricket Club |
| GDCC | Great Dane Club of California |
| GDCC | Greater Detroit Cricket Club |
| GDCM | Great Dane Club of MatSu |
| GDCT | Great Dane Club of Tucson |
| GDDC | Greater Denver Dalmatian Club |
| GDFC | Glenorchy District Football Club |
| GDFC | Great Danes Fight Club |
| GDRC | Gosford District Rifle Club |
| GEBC | Gran Empresa Business Club |
| GEC | Greener Earth Club |
| GEC | Gwangyang English Club |
| GEC | The Greener Earth Club |