Overall, I like the idea, but I think there are two serious limitations why a GG tournament might not work out.
1. One possible problem with a GG try out is that anyone who's played CSS long enough or against me for a map or two knows that EVERY noob gets off a lucky shot once in a while. But, in the try-out if someone gets off a lucky shot they've got a pretty big advantage going forward...and may end up winning though not technically the better player. One possible solution would be that it goes gun game and when someone gets the kill they get a point for that round, but then BOTH players get upgraded to the next weapon, keeping both players with the same gun, that way a lucky shot may happen but overall the better player will win more rounds, as each round both players have the same advantage.
2. But, my biggest problem with doing a GG style try out is that it may end up taking up too much time. We're gonna have close to 40 or more people for this. Though, I'm planning to divide players into groups and have try-outs on different days and time, but even if we divide things up into groups of 5, it's going to take a LONG time for 5 people to go through 5 full gun game matches with each other. Since everyone gets a chance to go head to head with everyone in their group. (most people don't want to sit around watching others duel all day). So, doing full GG 1v1 matches may just take up too much TIME. A solution could be a limited gun game. Such as, just 1 pistol rd, 1 mp5 rd, and 1 scout round. OR to make the GG round of the tournament come later after the first few rounds of the tournament limiting the number of players that you'd have to go head to head against.
I think time is still my biggest concern....we're dealing with some serious ADHD mofo's out there...who either are on or NEED to be on some medication.. haha