| extension name | file type | Classification |
|---|---|---|
| GMD | GroupMail Message | text file |
| GPD | Generic Printer Description File | text file |
| GPN | GlidePlan Map Document | text file |
| GSD | General Station Description File | text file |
| GTHR | Gather Log File | text file |
| GV | Graphviz DOT File | text file |