[5][8][9] The U.S. Federal Communications Commission (FCC) granted a construction permit in August 1946 for a new station to broadcast on 1540 kilohertz and serve the community of Galveston, Texas.
Chosen to represent original owner James W. Bradner's Galveston Broadcasting Company, the "KGBC" call sign was assigned by the FCC.
[15] With shifting ownership and declining fortunes, the station became "KXKX" in 1979 and "KQQK" in 1986 before signing off forever and having its license cancelled by the FCC in March 1989.
The KGBC broadcast facilities suffered both flooding and damage, knocking the station off the air and keeping it dark for several weeks.
In February 2018, KGBC began simulcasting KLVL fulltime in order to expand the Synergy Radio Network onto the Island and surrounding coastal communities.
KGBC's Texas sister stations with SIGA Broadcasting include KTMR (1130 AM, Converse), KLVL (1480 AM, Pasadena), KAML (990 AM, Kenedy-Karnes City), KHFX (1140 AM, Cleburne), and KFJZ (870 AM, Fort Worth).