I read this entire series forty years ago. It was a different world then. Male and female roles were clearly defined and how well the actors played them determined survival on primative Gor. I doubt these very exciting, well crafted and hard to put down novels could find a publisher today.
Along with The Hobbit, Dragon Riders of Pern and some Nancy Springer novels, Tarnsman of Gor was one of the earliest building blocks of my pulp fiction reading and fantasy role playing hobby. The tales of Gor or Counter Earth are a combination of Conan meets John Carter of Mars. The hero, Tral Cabbot, is an earthman who is abducted to Gor and finds adventure in a barbaric culture controlled by a small group with highly advanced technology which is, of course, called magic. (This, high tech culture controlling barbarians with their magic, is a plot element common in many a pulp fantasy novel, including Fritz Leibers Gather Darkness.) The books over flow with magic, sword fights, scores of alien creatures like the Tarns, science fiction and, with an added appeal to adolescent boys, slave girls.