I managed to find a way to get out of bounds within ground Zero by complete accident, sadly i couldn't save a clip of me actually clipping out of bounds due to my SD card being full but i have a clip of me being out of bounds if you want proof. Someone who was willing to help me recreate this glitch found a YouTube video of someone clipping out of bounds in a different spot of the same area, here is a link to the video in question:

You seem to be able to be pushed out of bounds if two surfaces are close to each other and you manage to squeeze yourself in between them. I hope this helps