"Ampzilla" was made by Great American Sound (GAS...kinda funny itself). They also made the FM receiver "Charlie the Tuner."
Adcom, in it's early days, had a series of products that all began with "GF." The amps were GFA, Pres were GFP, etc. "GF" stood for "Great Fuckin'" as in "Great Fuckin' Amp" and "Great Fuckin' Preamp." At the time, not surprisingly, Adcom was based in New Jersey.
Oh, the tuner wasn't very good. The folks at the factory said that "GFT" stood for "Grossly Flawed Tuner."