| South Portland to Gaeta | 4,086.26 mi (6,576.20 km) |
| South Portland to Gaggiano | 3,742.28 mi (6,022.62 km) |
| South Portland to Galatina | 4,326.27 mi (6,962.47 km) |
| South Portland to Galatone | 4,322.64 mi (6,956.62 km) |
| South Portland to Galbiate | 3,743.98 mi (6,025.36 km) |
| South Portland to Gallarate | 3,723.35 mi (5,992.15 km) |
| South Portland to Galliate | 3,725.43 mi (5,995.50 km) |
| South Portland to Gallipoli | 4,323.19 mi (6,957.50 km) |
| South Portland to Gambettola | 3,926.91 mi (6,319.75 km) |
| South Portland to Gambolo | 3,739.88 mi (6,018.75 km) |
| South Portland to Garbagnate Milanese | 3,738.56 mi (6,016.62 km) |
| South Portland to Gardone Val Trompia | 3,781.67 mi (6,086.01 km) |
| South Portland to Garlasco | 3,744.04 mi (6,025.45 km) |
| South Portland to Gassino Torinese | 3,699.71 mi (5,954.10 km) |
| South Portland to Gatteo | 3,929.63 mi (6,324.13 km) |
