| Castel Gandolfo to Grottaglie | 262.50 mi (422.46 km) |
| Castel Gandolfo to Grottammare | 105.89 mi (170.41 km) |
| Castel Gandolfo to Grugliasco | 342.70 mi (551.52 km) |
| Castel Gandolfo to Grumo Appula | 215.82 mi (347.33 km) |
| Castel Gandolfo to Grumo Nevano | 100.88 mi (162.35 km) |
| Castel Gandolfo to Gualdo Tadino | 102.92 mi (165.63 km) |
| Castel Gandolfo to Guardiagrele | 86.26 mi (138.82 km) |
| Castel Gandolfo to Guastalla | 240.65 mi (387.28 km) |
| Castel Gandolfo to Gubbio | 110.85 mi (178.39 km) |
| Castel Gandolfo to Guspini | 260.30 mi (418.92 km) |
| Castel Gandolfo to Gussago | 294.08 mi (473.28 km) |
| Castel Gandolfo to Iesi | 126.33 mi (203.32 km) |
| Castel Gandolfo to Iesolo | 261.60 mi (421.01 km) |
| Castel Gandolfo to Iglesias | 273.76 mi (440.57 km) |
| Castel Gandolfo to Imola | 186.18 mi (299.63 km) |
