GRC
- Ancient Greek
- Atlanta
- GNU Radio Companion
- Gender Recognition Certificate
- General Revenue Corporation
- Genome Reference Consortium
- Ghana Railway Corporation
- Gibson Research Corporation
- Glasgow Rowing Club
- Glass fiber reinforced concrete
- Glenn Research Center
- Global Rallycross
- Gordon Research Conferences
- Governance, risk management, and compliance
- Government of the Republic of China
- Grassroots Radio Coalition
- Great Chesterford railway station
- Greece
- Green River College
- Gridcoin
- Group representation constituency
- Guided-rotor compressor
- Gulf Research Center
- Guthy-Renker
- Medieval Greek
- Royal Canadian Mounted Police
- The Falcon and the Winter Soldier