The Wikipedia page has this to say:
"The Gor novels have been criticized for their focus on relationships between dominant men and submissive women, the latter often in positions of slavery. The Encyclopedia of Fantasy says, "later volumes degenerate into extremely sexist, sadomasochistic pornography involving the ritual humiliation of women, and as a result have caused widespread offence." Science fiction/fantasy author Michael Moorcock has suggested that the Gor novels should be placed on the top shelves of bookstores, saying, "Iím not for censorship but I am for strategies which marginalize stuff that works to objectify women and suggests women enjoy being beaten." "
This jives with what both Hershele and Shima have said about the first few volumes being just bad fantasy but not outright porn. Work has been extremely busy lately, but at some point I'd like to try finding the first couple books at the library and giving them a skim at least.
Really, the only reason I'm even giving this series a chance is because of how well-known it is. Also, good to have you back, Catalogue. I thought maybe you were dead in a ditch or something.