There is 1 prestige suite on each floor from 19th to the 22nd floor.
Sofitel Gold Coast
I am not sure where the prestige suites are, but if you email the property they will tell you.
In general all rooms are fantastic. The best part of the hotel is the restaurant on level 3.
Try the French Onion soup
Get an answer from Sofitel Gold Coast Broadbeach staff and past guests.