Comment by n42

If I am remembering correctly, there was a moment where Garry was seriously considering using Squirrel instead of Lua. I think he experimented with JavaScript too.

I’m not sure it’s still the case but he modified Lua to be zero indexed and some other tweaks because they annoyed him so much, so it’s possible if you learned GMod Lua you learned Garry’s Lua.

Of course his heart has been with C# for many years now.