| Acronym | Definition |
|---|
| GRG | Game Recognize Game |
| GRG | Grand Romantic Gesture |
| GRG | Glass Reinforced Gypsum (cementitious composite material reinforced with glass fibers) |
| GRG | Gerontology Research Group |
| GRG | General Research Grant (various organizations) |
| GRG | Generalized Reduced Gradient |
| GRG | Gridded Reference Graphic (US DoD) |
| GRG | General Relativity and Gravitation |
| GRG | Guangzhou Radio Group (China) |
| GRG | GNU Report Generator |
| GRG | Gravity Recoverable Gold (value estimation) |
| GRG | Green Recycling Group Ltd (UK) |
| GRG | Grand Rapids Griffins |
| GRG | Genetic Risk Group |
| GRG | Great Running Game |
| GRG | Gamma Ray Gauge (radiation thickness measurement device) |
| GRG | Global Retail Group (Philippines) |