| Abbreviation | Definition |
|---|---|
| GBC | Green Building Certifications |
| GBIF | Global Biodiversity Information Facility |
| GBN | to Get Back to Nature |
| GC | Green Code |
| GCARD | Global Conferences on Agricultural Research for Development |
| GCC | General Coordinating Committee |
| GCCD | Grafton County Conservation District |
| GCCE | Global Climate Change Education |
| GCCEP | Global Climate Change Education Project |
| GCCI | Global Climate Change Initiative |
| GCCM | Global Carbon Cycle Modeling |
| GCEF | Greenpoint Community Environmental Fund |
| GCET | Global Conference on Environmental Taxation |
| GCPA | Gulf Coast Power Association |
| GCS | Gas Collecting Station |
| GDF | Gasoline Dispensing Facilities |
| GEAC | Gimli Environmental Advisory Committee |
| GEAI | Global Environmental Assurance Inc |
| GEBF | Gulf Environmental Benefit Fund |
| GECD | Global Environmental Change Data |