I looked them up on IMDB... Cause I was curious -snickers- Yeah... here's the Plot line for the first movie aptly titled "Gor"
American professor Tarl Cabot is transported via a magical ring to planet Gor, where he must help an oppressed country overthrow its evil king and his barbarian henchmen.
Do we have Kings on Gor? I thought we had like.. administrators.. and Tatrixes... and Ubars.. I've never heard mention of any kings... except those Priest-King guys.. yeah -scratches head-