| Abbreviation | Definition |
|---|---|
| GBSAGA | Georgian Bay Steam, Auto, Gas and Antique association |
| GBSM | Great Basin Sports Museum |
| GCAG | Global Children's Art Gallery |
| GCAM | Gulf Coast Archive and Museum |
| GCMA | Greenville County Museum of Art |
| GCRM | Gold Coast Railroad Museum |
| GDTC | Giant Dome Theater Consortium |
| GEH | George Eastman House |
| GEMM | Gender Equity in Museums Movement |
| GFSM | Gray Fossil Site and Museum |
| GFSM | Gray Fossil Site Museum |
| GIFL | Greece Is For Lovers |
| GLAM | Galleries Libraries Archives and Museums |
| GLAM | Galleries Libraries Archives Museums |
| GLAM | Galleries, Libraries, Archives and Museums |
| GLCM | Great Lakes Children's Museum |
| GMD | Goldstein Museum of Design |
| GMLC | Global Museum Leaders Colloquium |
| GMMB | Ghana Museums and Monuments Board |
| GMOA | Georgia Museum Of Art |