This is Eden Wiki not Harry Potter Wiki :)
It can be the Harry Potter wiki if you just... BELIEVE. (explodes)
Here's the map of Hogwarts_By_Brendan V7:
I explored the whole thing, there's no maze. There are other Hogworts worlds out there, so maybe one of them has it. Maybe Brendan is waiting for 2.0 so he can put a portal in the middle of the maze.