It would be very nice for a GCC. It looks to be their 32x24" one and I remember it having GCC safe spacing when I was looking at those cages... 5/8" I think. They were such a good price. It's a shame they only made them for a short time.
EDIT: On second thought, it's possible that cage is the larger size, which would have spacing too big for a GCC. But if it is the 32" wide one, then it would be great for a GCC.