Any self-respecting Star Trek fan can tell you how to defeat the Gorn. It is a simple manner of keeping ahead of them (as they are slow walkers) until such time you are able to invent gunpowder to manufacture a gun and kill them.
What I did not know until today was that Mythbusters fully explored the phenomenon of the Gorn, going so far as to recreate Kirk's infamous Gorn Cannon from Arena.
Everyone else on the Internet has probably already seen this, hence here it is on my blog.
The character acting is better than in the original.