Originally Posted by ben20
With the GP-points suite upgrade you will get a CONFIRMED suite. (the above post is not correct).
However the Suite upgrade using GP-points cannot be used in combination with hyatt.com rates (most of the cases), but you have to book a high corp. or rack rate.
That is correct. Hyatt suite upgrades requires paying at least a "deluxe" rack to upgrade with points. However, individual properties may vary. I stayed at the Grand SF last week and I called the hotel directly to ask for a suite upgrade, I then asked GP to call the person at the hotel to "release" a suite for me, and then points were immediately pulled from my account. I was paying a Hyatt.com rate.