| State: | GU |
| Type: | GU |
| Route: | 6 |
| Alternate Name: | Spruance Drive/Halsey Drive |
| Map Custom: | yes |
| Map Notes: | GH-6 highlighted in red |
| Maint: | Guam Department of Public Works |
| Direction A: | West |
| Terminus A: | in Piti |
| Direction B: | East |
| Junction: | in Asan-Maina |
| Terminus B: | in Asan-Maina |
| Previous Type: | GU |
| Previous Route: | 5 |
| Next Type: | GU |
| Next Route: | 7 |
Guam Highway 6 (GH-6) is one of the primary automobile highways in the United States territory of Guam. It is known as Spruance Drive within Piti and Halsey Drive within Asan-Maina: both named for noteworthy US Navy Admirals that served in the Pacific Ocean theater of World War II: Raymond A. Spruance and William Halsey Jr., respectively.
The route creates a diversion along part of GH-1 into the highlands of Piti and Asan-Maina and is the primary means of reaching Nimitz Hill and Nimitz Hill Annex. Both termini are with GH-1, and the only other major junction is with the terminus of GH-7 near the eastern end, providing access to Naval Hospital Guam on Agana Heights.[1]