I think this would make the most sense in-universe.
Kor
I concur.
I remember the first time I saw this episode as a kid and, when it was over, having to pull out an encyclopedia to find out what a gorgon was. I didn't understand the nuances of what I had read, but I at least understood that a gorgon was a winged "monster" like the friendly angel (which also has wings) that was in the episode. It wasn't until much later that I read that the name of the creature was Gorgan and that Shatner had either screwed up the line or didn't understand the difference. At any rate, Kirk said "the gorgon" so, by strict definition, the name of the alien was never revealed.