| Term | Definition |
|---|---|
| GJI | Geophysical Journal International |
| GLONASS | Global Navigation Satellite System |
| GLOSS | Global Sea Level Observing Systems |
| GPS | Global Positioning System |
| GRACE | Gravity Recovery And Climate Experiment |
| GRGS | Groupe de Recherches de Géodésie Spatiale, France |
| GRL | Geophysical Research Letters |
| GSFC | Goddard Space Flight Center, USA |
