| San Marcos to Gaffney (South Carolina) | 2,025.77 mi (3,260.17 km) |
| San Marcos to Gages Lake (Illinois) | 1,706.76 mi (2,746.76 km) |
| San Marcos to Gahanna (Ohio) | 1,949.31 mi (3,137.11 km) |
| San Marcos to Gainesville (Florida) | 2,058.23 mi (3,312.41 km) |
| San Marcos to Gainesville (Georgia) | 1,909.54 mi (3,073.11 km) |
| San Marcos to Gainesville (Texas) | 1,154.02 mi (1,857.21 km) |
| San Marcos to Gainesville (Virginia) | 2,227.82 mi (3,585.33 km) |
| San Marcos to Gaithersburg (Maryland) | 2,249.56 mi (3,620.32 km) |
| San Marcos to Galena Park (Texas) | 1,311.91 mi (2,111.32 km) |
| San Marcos to Galesburg (Illinois) | 1,565.87 mi (2,520.03 km) |
| San Marcos to Galion (Ohio) | 1,957.02 mi (3,149.53 km) |
| San Marcos to Gallatin (Tennessee) | 1,749.89 mi (2,816.18 km) |
| San Marcos to Gallup (New Mexico) | 508.27 mi (817.99 km) |
| San Marcos to Galt (California) | 423.52 mi (681.58 km) |
| San Marcos to Galveston (Texas) | 1,341.41 mi (2,158.79 km) |
