| Gaithersburg to Grovetown (Georgia) | 481.06 mi (774.19 km) |
| Gaithersburg to Guayama (Puerto Rico) | 1,606.68 mi (2,585.70 km) |
| Gaithersburg to Guaynabo (Puerto Rico) | 1,580.49 mi (2,543.55 km) |
| Gaithersburg to Gulf Shores (Alabama) | 852.92 mi (1,372.65 km) |
| Gaithersburg to Gulfport (Florida) | 847.82 mi (1,364.43 km) |
| Gaithersburg to Gulfport (Mississippi) | 901.14 mi (1,450.24 km) |
| Gaithersburg to Gunbarrel (Colorado) | 1,483.70 mi (2,387.79 km) |
| Gaithersburg to Gurnee (Illinois) | 603.75 mi (971.64 km) |
| Gaithersburg to Guthrie (Oklahoma) | 1,129.31 mi (1,817.44 km) |
| Gaithersburg to Guttenberg (New Jersey) | 204.89 mi (329.74 km) |
| Gaithersburg to Guymon (Oklahoma) | 1,329.39 mi (2,139.45 km) |
| Gaithersburg to Hacienda Heights (California) | 2,270.34 mi (3,653.76 km) |
| Gaithersburg to Hackensack (New Jersey) | 206.81 mi (332.83 km) |
| Gaithersburg to Hackettstown (New Jersey) | 173.43 mi (279.11 km) |
| Gaithersburg to Hagerstown (Maryland) | 44.24 mi (71.20 km) |
