| Abbreviation | Definition |
|---|---|
| GOKHMT | God only knows how many times |
| GPa | gigapascal |
| GPa | Gigapascals |
| GPD | Gallons Per Day |
| GPED | Gallons Per capita per Day |
| GPF | Gallons Per Flush |
| GPG | Grams Per Gallon |
| GPH | Gallons Per Hour |
| GPI | Grains Per Inch |
| GPM | Gallons Per Minute |
| GPM/D | Gallons Per Man per Day |
| GPMD | Gallons Per Minute Differential |
| GPP | Grains Per Pound |
| GPS | Gallons Per Second |
| GPUKM | Gallons Per Unit Per Kilometer |
| GPY | Gallons Per Year |
| gr | grain |
| GR | Grain (approximately 60 Mg) |
| GR | Gram |
| gr. | grain |