| Gretna to Grovetown (Georgia) | 521.84 mi (839.83 km) |
| Gretna to Guayama (Puerto Rico) | 1,716.68 mi (2,762.72 km) |
| Gretna to Guaynabo (Puerto Rico) | 1,701.21 mi (2,737.83 km) |
| Gretna to Gulf Shores (Alabama) | 142.73 mi (229.70 km) |
| Gretna to Gulfport (Florida) | 468.75 mi (754.38 km) |
| Gretna to Gulfport (Mississippi) | 68.64 mi (110.47 km) |
| Gretna to Gunbarrel (Colorado) | 1,103.86 mi (1,776.50 km) |
| Gretna to Gurnee (Illinois) | 868.90 mi (1,398.36 km) |
| Gretna to Guthrie (Oklahoma) | 592.63 mi (953.74 km) |
| Gretna to Guttenberg (New Jersey) | 1,172.66 mi (1,887.22 km) |
| Gretna to Guymon (Oklahoma) | 808.23 mi (1,300.72 km) |
| Gretna to Hacienda Heights (California) | 1,655.74 mi (2,664.66 km) |
| Gretna to Hackensack (New Jersey) | 1,174.71 mi (1,890.51 km) |
| Gretna to Hackettstown (New Jersey) | 1,140.32 mi (1,835.17 km) |
| Gretna to Hagerstown (Maryland) | 968.56 mi (1,558.75 km) |
