There are a grand total of two things that need fixing on this map.

First of all the wall on the town is easy to clip trough which includes the support beams. My recommendation would be to remove the thing entierly and just have rocks in its stead or make the thing completely out of concrete without too much details on it.

Second of all a set of door dont open the way they are supposed to in the bunker of your map.

Otherwise it's a great map with great athmosphere, and i hope that you make lots of future content for the gmod community to enjoy.