Dont stress on the moment if GM program will or will not work. Instead give yourself a pat on the back for even applying to go into the program. Take it one day at a time for now and when the time comes to enter the program deal with that as it comes.
I do know from what I have read the GM program is as I said intense but has helped so many people overcome the addiction / to quit and to stay quit!
If /when you feel the urges to gamble then post here, hit up a phone line or speak to someone around you. Do anything and everything to overcome that one urge! It will pass they always do its just if we choose to act on them or not which makes all the difference!!!