 The two stations share studios on 111 Chalan Santo Papa in Hagåtña (Agana); KTGM's transmitter is located in the heights of Barigåda (Barrigada).KTGM signed on the air in 1987, broadcasting on NTSC analog channel 14.It was Guam's second commercial TV station after KUAM-TV had signed on 31 years prior, and the first TV station of any kind on Guam in nearly 17 years since PBS member KGTF's sign on.