GunGame 5.1 installed and runs fine, but I'm having problems with the way it actually plays.
1) When you die, you die. You don't respawn until the next round. I tried it with and without gg_deathmatch on, but it doesn't work either way.
2) When you get a kill, it levels you up, but you don't get the new weapon until the start of the next round. You keep your weapon until the round ends.
3) You can only level up once per round. For example, I kill someone and get raised from level 1 to level 2. I kill someone else without dying, but I remain at level 2. Next round, I can kill someone and go from 2 to 3, but it stops there. One level per round.
I was given advice here, and I did what he told me, which was to turn gg_turbo and gg_deathmatch on, but it still didn't work.