Gardendale PD/FD
They are on the County TRS system. Gardendale PD TGID 33072 - Dispatch & Tac Chs
33104, 33136, 33168, 33200. Gardendale FD 33232 Dispatch & Tac Chs 33264, 33296, 33328, 33360. They are not very active and unless you lock onto their TGIDs, you may have a long wait between calls.