| Acronym | Definition |
|---|
| GRU | Gainesville Regional Utilities |
| GRU | Gamers Rise Up |
| GRU | Glavnoye Razvedyvatelnoye Upravleniye (Soviet Military Int) |
| GRU | Geriatric Rehabilitation Unit (various organizations; Canada) |
| GRU | Graves Registration Unit (UK) |
| GRU | Sao Paulo, Sao Paulo, Brazil - Guarulhos (Airport Code) |
| GRU | Groundwater Resource Unit |
| GRU | Gardner Research Unit (Japan) |
| GRU | Chief Intelligence Directorate of the Soviet General Staff |
| GRU | Grid Reference Unit |
| GRU | Gloves of Running Urgently (gaming; Team Fortress 2) |
| GRU | Ground Replaceable Unit |
| GRU | General Research Use |
| GRU | General Resource Unit |
| GRU | Guidance Regulator Unit |