| Abbreviation | Definition |
|---|---|
| GMGM | Good Music Good Medicine |
| GMGS | Great Music in a Great Space |
| GMI | Gospel Music International |
| GMM | Good Mood Music |
| GMM | Graspop Metal Meeting |
| GMMAZ | Greater Manchester Music Action Zone (UK) |
| GMMF | Goats Music and More Festival |
| GMMY | Golden Music Memories of Yesteryear |
| GMN | Global Music Network |
| GMNS | Great Music Never Stops |
| GMPB | Greater Midwest Pipe Band |
| GMPC | Gnome Music Player Client |
| GMPE | GHRSST Multi product Ensemble |
| GMPI | Generalized Music Plug in Interface |
| GMPI | Generalized Music Plugin Interface |
| GMPI | Generalized Music Plug-in Interface |
| GMR | Global Music Rights |
| GMS | Goyishe Music Service |
| GMSS | Gwent Music Support Service |
| GMST | Gospel Music School of Texas |