| Abbreviation | Definition |
|---|---|
| GLW6 | Geophysics Luminous Phenomena over Water: Phosphorescent Patches Moving in Circles |
| GLW7 | Geophysics Luminous Phenomena over Water: Phosphorescent Spinning Crescents |
| GLW8 | Geophysics Luminous Phenomena over Water: Zigzag Phosphorescent Flashes |
| GLW9 | Geophysics Luminous Phenomena over Water: White Water or Milky Sea |
| GMET | Gridded Meteorological Ensemble Tool |
| GMS | Geostationary Meteorology Satellite |
| GNFE | Global Network for the Forecasting of Earthquakes |
| GNU | Gonna Need Umbrella |
| GOAT | Geographic Ozone Assessment Technology |
| GODAR | Global Oceanographic Data Archaeology and Rescue |
| GOMOS | Global Ozone Monitoring by Occultation of Stars |
| GPCP | Global Precipitation Climatology Program |
| gpdm | geopotential metres |
| GPH | Geo Potential Height |
| gpm | geopotential metres |
| GPM | Global Precipitation Measurement |
| GR&R | Gauge Reproducibility And Repeatability |
| GRIB | Gridded Binary |
| GRIP | Genesis and Rapid Intensification Processes (hurricane research) |
| GSC | Geographical Search Criteria |