From what I remember, it was S'cipio. Look at his sig picture. He's the only defunked, non-Kirk kicking Gorn around here.
I did write some stories early on that implied I had played that role. What I'm remembering is a cooperative story i was part of later where the coordinator kept reminding me, "remember, when it comes up, Agave was the one who fought Kirk. He was drunk at the time. I have plans for this....."
Or words to that effect. I thought it was Chuut, but maybe it was J'inn.
-S'cipio