According to Wiki - Goebel was popular in its latter days in the 1970s and 1980s, as a low-priced beer, sold by the case in bottles and aluminum cans. In the mid to late seventies, a case of twenty four bottles cost $4.44 not including the dollar refund when all empties were returned. Eventually, Pabst Brewing Company acquired Stroh's and their other brands (including Goebel), and discontinued the Goebel brand at the end of 2005.
As far as the Genesee Bock tasting "off", there was probably a dead bloated body floating in the Genesee river near their water intake system.