| Abbreviation | Definition |
|---|---|
| GSSAC | Greater Spokane Substance Abuse Council (est. 1982; Washington) |
| GSSC | General Studies Student Council |
| GTC | Gasification Technologies Council |
| GTC | General Teaching Council |
| GTC | Great Trail Council |
| GTCE | General Teaching Council for England |
| GTCS | General Teaching Council for Scotland |
| GTCS | General Teaching Council for Scotland's |
| GTCW | General Teaching Council for Wales |
| GUAC | Groundwater Users Advisory Council |
| GUCC | Georgia Utilities Coordinating Council |
| GUCC | Georgia Utility Coordinating Council |
| GUCC | Glen Urquhart Community Council |
| GVC | Green Valley Council |
| GVC | Green Valley Council's |
| HAAC | Holland Area Arts Council |
| HABC | Hellenic Australian Business Council |
| HACLA | Housing Authority of the City of Los Angeles |
| HALC | Hampshire Association of Local Councils |
| HALC | Hellenic American Leadership Council |