GROG
| Acronym | Definition |
|---|---|
| GROG | Guide du Rôliste Galactique (French gaming group) |
| GROG | Groupes Régionaux d'Observation de la Grippe |
| GROG | Goodwood Racehorse Owners Group (UK) |
| GROG | Global Resource Observation Group (formed 2001) |
| GROG | Geriatric Radiation Oncology Group (Italy) |