This is a very strange map. There's not much point putting it in a gameday since it's so far outside the standard frame of reference that we can't help you much.
It's not a TF2 map. It won't be fun to play in tf2. Everything is a tiny corridor or a big open space, neither of which work very well in tf2. Look at official maps and see how big the spaces are, and try and match to that. Also look at how many routes between areas tf2 maps have: this map has several rooms with only one way in or out: tf2 almost always has two or more.
It has a lot of gimmicks. Gimmicks often don't work very well - unless its really super clear whats going on, they just annoy players. Door overrides, electrified fences... these aren't a part of tf2 gameplay, people wont know what to do with them and will just get pissed off.
In some ways, it's broken. Why does it have such a massive filesize? Half a gigabyte is the largest map i've ever seen. You also seem to have made the entire map using a 1-unit grid, which means that there's lots of little edges and gaps in the wall. These ruin the optimisation and will make the leak that soosh mentioned above basically impossible to find.
If you want to keep the layout, keep it as a GMod map - in which case we can't really help you here, and you'll probably want to remake it to fix the grid issues. If you want to make a TF2 map the most sensible thing to do is use what you've learned and start a new project.
