| Gloucester to Grottaferrata | 987.30 mi (1,588.91 km) |
| Gloucester to Grottaglie | 1,217.23 mi (1,958.95 km) |
| Gloucester to Grottammare | 967.41 mi (1,556.89 km) |
| Gloucester to Grugliasco | 649.28 mi (1,044.92 km) |
| Gloucester to Grumo Appula | 1,166.59 mi (1,877.45 km) |
| Gloucester to Grumo Nevano | 1,085.83 mi (1,747.48 km) |
| Gloucester to Gualdo Tadino | 917.05 mi (1,475.86 km) |
| Gloucester to Guardiagrele | 1,018.95 mi (1,639.83 km) |
| Gloucester to Guastalla | 760.56 mi (1,224.01 km) |
| Gloucester to Gubbio | 903.68 mi (1,454.33 km) |
| Gloucester to Guspini | 998.29 mi (1,606.60 km) |
| Gloucester to Gussago | 710.02 mi (1,142.67 km) |
| Gloucester to Iesi | 919.06 mi (1,479.08 km) |
| Gloucester to Iesolo | 805.38 mi (1,296.13 km) |
| Gloucester to Iglesias | 1,009.09 mi (1,623.98 km) |
