| Acronym | Definition |
|---|
| GMSC➣Gateway Mobile Services Switching Center |
| GMSC➣Gateway Mobile Switching Center |
| GMSC➣General Medical Services Committee (UK) |
| GMSC➣Globalisation Management Strategies Conference (California) |
| GMSC➣Glenrothes Motor Sport Club (Fife, Scotland, UK) |
| GMSC➣Great Moor Sailing Club (UK) |
| GMSC➣Geology and Mineral Sciences |
| GMSC➣Green Mountain Suzuki Camp (music camp; Rochester, VT) |