| Abbreviation | Definition |
|---|---|
| GVO | Greenwich Village Orchestra |
| GVT | German Volume Training |
| GWBB | Green Wave Brass Band |
| GWCB | Great Wyrley Community Band |
| GWCB | Greater Western Community Band |
| GWCB | Greater Westfield Community Band |
| GWCB | Greater Windsor Concert Band |
| GWM | Golden Wings Music |
| GWPI | Greater Washington Piano Institute |
| GWTC | Great Western Timbre Company |
| GZ | Gorillaz |
| H | Harmony |
| H&H | Handel and Haydn |
| H&H | Handel and Haydn Society |
| H/M | Heavy/Metal |
| H16 | Hálova 16 |
| HAMS | Holland America Music Society |
| HAMT | Himalayan Academy of Music Technology |
| HANJU | Hanju |
| HARM | Humanity Against Rap Music |