| Abbreviation | Definition |
|---|---|
| GOTS | Global Organic Textile Standard |
| GP | Green Peace |
| GP | Greenery Planting |
| GPES | Graduate Program in Environmental Science |
| GPES | Graduate Program on Environmental Sciences |
| GPF | Gas Processing Facilities |
| GPH | Gallons Per Hour |
| GPI | Green Planet International |
| GPP | Green Public Procurement |
| GPPL | Global Premises Pollution Liability |
| GPT | Gross Pollutant Trap |
| GQPA | Groundwater Quality Protection Act |
| GRCA | Ganaraska Region Conservation Authority [Ontario, Canada] |
| GRCA | Grand River Conservation Authority [Ontario, Canada] |
| GREAT | Great River Environmental Action Team |
| GREAT | Groundwater Recovery Enhancement And Treatment |
| GREEN | Global Rivers Environment Education Network |
| GREEN | Grass Roots Environmental Efforts Now |
| GREF | Graduate Research Environmental Fellowship |
| GREF | Graduate Research Environmental Fellowships |