| Abbreviation | Definition |
|---|---|
| GPSO | Grosse Pointe Symphony Orchestra |
| GQ | Graceland Quality |
| GRCH | Glasgow Royal Concert Hall |
| GRM | Gleneil Roseman Music |
| GRM | Grime and Rap Music |
| GRM | Groupe De Recherches Musicales |
| GRPD | Greater Richmond Pipes and Drums |
| GRRB | Green Rock River Band |
| GRSBM | Grand Rapids School of the Bible and Music (Grand Rapids, MI) |
| GS | Golden Silver |
| GS | Grand Symphony |
| GS | Group Sounds |
| GS | Guitar Steel |
| GSB | ground state band |
| GSB | Guarded Side-Band |
| GSLM | Go See Live Music |
| GSMB | Gold Star Marching Band |
| GSME | Greek Society for Music Education |
| GSMF | Granite State Music Festival |
| GSO | Gamer Symphony Orchestra |