| Acronym | Definition |
|---|
| GCG | Genetics Computer Group |
| GCG | Garden City Group (various locations) |
| GCG | Grand Coalition Government (Kenya) |
| GCG | Gain Capital Group (various locations) |
| GCG | Gulf Commercial Group (various locations) |
| GCG | Good Corporate Governance |
| GCG | Glucagon |
| GCG | Generalized Chaplygin Gas (cosmology) |
| GCG | Gypsy Chief Goliath (band) |
| GCG | Garden Club of Georgia (est. 1928) |
| GCG | Global Consumer Group |
| GCG | Gallocatechin Gallate (catechin) |
| GCG | Great Canadian Grid (virtual network) |
| GCG | Gabriel Consulting Group (Beaverton, OR) |
| GCG | Gala Coral Group (gambling; UK) |
| GCG | Globalization for the Common Good |
| GCG | Gaiety Cinema Group (Ireland) |
| GCG | Global Church of God |
| GCG | Good Catholic Girl |
| GCG | Generalized Conjugate Gradient |
| GCG | Global Change Game |
| GCG | Geological Curators' Group |
| GCG | Giant-Cell Granuloma |
| GCG | Guidance Control Group |
| GCG | Gwaen Cae Gurwen (South Wales village) |
| GCG | Great Ceasar's Ghost (band) |