I have to cast some doubt on the accuracies of this site, When I visited WZGC (WGKA-FM) in 1973 they were owned by General Cinema and still transmitted
with a different horizontal and vertical 12 bay antenna system from the top of an office building in downtown Atlanta. Each antenna was powered by its own
Collins 830 series 10 Kilowatt power amplifier driven by a common 830 series IPA and exciter. (I would later become Director of Engineering for General Cinema)
The move to Peachtree was done by Milford Smith when First Media bought the station likely in the late 70's to early 80's. They were never on Peachtree as WGKA.