GRG or variant thereof, may refer to:

• Gerontology Research Group, (GRG) American social sciences research group
• GRG Banking, a Chinese corporation manufacturing ATMs
• Global Restructuring Group of Royal Bank of Scotland
• GrG, the astronomical abbreviation for group of galaxies
• grg, the ISO:639 language code for the Gira language
• Gathorne Robert Girdlestone (1881–1950), British surgeon
• GRG Matriculation Higher Secondary School, in Coimbatore, Tamil Nadu, India
• Georges River Grammar School, in Georges River, New South Wales

This disambiguation page lists articles associated with the title GRG.
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