GRG
GRG or variant thereof, may refer to:
- Gerontology Research Group (GRG)
- GRG Banking, a Chinese corporation manufacturing ATMs
- GrG, the astronomical abbreviation for group of galaxies
- GRG, the astronomical abbreviation for giant radio galaxy
- grg, the ISO:639 language code for the Gira language
- Gathorne Robert Girdlestone (1881–1950), British surgeon
- GRG Polytechnic college, in Coimbatore, Tamil Nadu, India
- GRG Matriculation Higher Secondary School, in Coimbatore, Tamil Nadu, India
- Georges River Grammar School (GRG)
- Get Rekt Gaming, an online gamers site (GRG)