| Abbreviation | Definition |
|---|---|
| GBC | Governing Body Commission |
| GCA | Global Commission on Adaptation |
| GCAM | General Commission for Audiovisual Media |
| GCDV | Georgia Commission on Domestic Violence |
| GCFC | Greater Cleveland Film Commission |
| GCI | Gross Commission Income |
| GCMN | Great Commission Movement of Nigeria |
| GCOA | 1.Globall commission on adaptation |
| GCP | Global Commission Payments |
| GCPC | Greater Cairo Planning Commission |
| GCSAR | General Commission for Scientific Agricultural Research |
| GCSC | Global Commission on the Stability of Cyberspace |
| GCTN | Great Commission Transmission Network |
| GESC | Government Employees Service Commission |
| GFC | Guyana Forestry Commission |
| GFCC | Ganga Flood Control Commission |
| GHRC | Goa Human Rights Commission |
| GHRC | Guatemala Human Rights Commission |
| GMRPTC | Greater Minnesota Regional Parks and Trails Commission |
| GNCC | Georgian National Communications Commission |