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.

This section is missing mileposts for junctions. Please help by adding them.

Location	mi	km	Destinations	Notes
Piti			GH-1 – Agat, Hagatna	Western terminus
Asan			GH-7 east – U.S. Naval Hospital Guam
			GH-1 – Agat, Hagatna	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi