| Greenock to Grottaferrata | 1,251.74 mi (2,014.48 km) |
| Greenock to Grottaglie | 1,463.10 mi (2,354.64 km) |
| Greenock to Grottammare | 1,217.71 mi (1,959.72 km) |
| Greenock to Grugliasco | 924.10 mi (1,487.20 km) |
| Greenock to Grumo Appula | 1,413.56 mi (2,274.90 km) |
| Greenock to Grumo Nevano | 1,346.29 mi (2,166.64 km) |
| Greenock to Gualdo Tadino | 1,172.13 mi (1,886.36 km) |
| Greenock to Guardiagrele | 1,272.43 mi (2,047.78 km) |
| Greenock to Guastalla | 1,016.39 mi (1,635.72 km) |
| Greenock to Gubbio | 1,159.25 mi (1,865.63 km) |
| Greenock to Guspini | 1,288.73 mi (2,074.01 km) |
| Greenock to Gussago | 963.47 mi (1,550.55 km) |
| Greenock to Iesi | 1,169.31 mi (1,881.82 km) |
| Greenock to Iesolo | 1,042.13 mi (1,677.14 km) |
| Greenock to Iglesias | 1,300.28 mi (2,092.61 km) |
