Also, some spots that i've found already. The square platform right near the claymores and PaP, the one surrounded by the small wall? If you stand in the center of that the zombos won't get to you. Also, if you jump down from the top of the tower, on the way down to right above the claymores there is an invisble ramp of sorts for zombies to go up i suppose, unfortunately if you sit at the top of that it is another god spot as the zombies will go up the metal ramp to attack you, but wont jump down onto the invisible one. So that isn't so much a glitch spot as it is an AI problem i suppose.

Also directly underneath the tower, behind the circular vent type thing you mantle to get to the intervention wallbuy, there is a pipe you can drop onto where the zombies cant hit you

Atop the map where you buy the Intervention you can carefully step onto the metal surrounding the ladder, and they cant get you there.

Theres also a minor platform where the bigger part of the fence ends behind deadshot and the pipe, towards QR. You can sit on this small ledge and the zombies will gather up on the pipe and look confused.

why not just post pictures of where they are at?

http://imgur.com/a/iUF6Y this is the spot that i found.

https://www.youtube.com/watch?v=88-V4PTTqYk

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=787068697

https://images-2.discordapp.net/.eJwNyEsOgyAUAMC7cADeB_l5mYYgQY0WAq-rpnevm1nMV33GpVa1i_S5AmzHzG1sekobqRZdW6tXSf2YOrcbkkjK-13eMoGJQgzGBkfReiTvgBfj2SIzUzTGexOBkRzRU_iAL9Jnr-r3ByNuIxA.-16sI-sxpyV9LjlNWGfxYrMbS08?width=2000&height=843

http://images.akamai.steamusercontent.com/ugc/82590107428346793/30CD2C6E2C7F6BC40419FDE520CC9F3CF4BB9F78/

http://images.akamai.steamusercontent.com/ugc/82590107428346493/FC0023BE34515723D4E4D3F8CF328B5600AEADEF/

Might have already been said but the highest point of the map, the platform where the intervention wall buy is a very good spot because the zombies can only come from one direction but I don't think it should be patched because it really challenges you to time your reloads right otherwise you could be swarmed by zombies and on the high rounds I've been red screened a few times nearly.

Found two.
http://imgur.com/a/9iZvJ

I havent read anything else in the discussion, But the entire "truck" beside Stamin Up is a god spot.

You can get on top of the truck by simply jumping on it.

The only spot I could find, truly the best.
https://www.youtube.com/watch?v=mpgOCDUMIic