Well one good way to find out about availability would be to try to actually book it!
If you don't have enough points in your account yet, call GP; I've found their reps to be very helpful.
Be somewhat cautious, in that many 33K suites are going to be junior suites, not necessarily with two bedrooms.
I have stayed at GH a few times and remember the rooms being on the small side - I hope Andaz isn't even smaller; I'm staying there two nights in early August.