| Acronym | Definition |
|---|
| GSMC | Good Shepherd Medical Center (Longview, TX) |
| GSMC | Great Smoky Mountain Council (Knoxville, Tennessee boy scouts) |
| GSMC | Global System for Mobile Communication |
| GSMC | Great Southern Motor Cargo Inc. (New Orleans, LA) |
| GSMC | Geospatial Standards Management Committee |
| GSMC | Gator Sport Management Club (Gainesville, FL; est. 2005) |
| GSMC | Ghana State Mining Corporation |
| GSMC | Gulf Shore Mustang Club (automobile club; Florida) |
| GSMC | Gunslingers Motorcycle Club (various locations) |
| GSMC | Gulf States Mennonite Conference |