Transfer Game Center info from Store ID to iCloud ID

Question

Hi!
I would like to know if there is a way to transfer all my Game Center info from my Store ID (google account) to iCloud ID (me account). This must include all my achievements, save data and progress, nickname and friends.
On the other side, I have a doubt about the games that sync theirs progress through iCloud. Because my Game Center is not linked to iCloud, where these games store the info?
For example, Cut the rope syncs its progress apparently through iCloud but I can not find any file on my iCloud storage. I have checked on the iCloud storage info in my iPad Settings and also in the Mobile Documents on my Mac Library. Maybe I'm not suppose to see those files but I guess that if the data of the game is on iCloud it won't be difficult to migrate Game Center to iCloud because iCloud have already my data...
I don't know if I'm clear enough....
Thanks in advance.

Answer 1

I have tried doing just as you have asked with my partner, but failed.
My gamecenter ID is my appleID. This seems to be the biggest problem.
It turns out that when we transfered my gamecenter ID to her newly created ID (Can be done in gamecenter) that it makes her newly created ID the appleID in the whole process. A big BUHBOW! We tried many different ways to get it to work but in the end I had to have her transfer back to my apple ID. ALL BACK TO NORMAL with my cloud! , you have no idea
Try it yourself, but if you used the same Gamecenter ID as your Apple ID be prepared to use the new account as your Apple ID.
It isn't supposed to be that way either, the GC transfer is supposed to do achievements and saves (in GC cloud only and not if saves are local(although there are depressing workarounds on the net for those)). I had iTunes support verify this whole process while I hammered them 'this wont affect MY appleID?', they say no it shouldn't. But testing this out first hand proved otherwise.
As I said, it may be different if your GC ID is not the same as your Apple ID.
I now have my partner cursing half eaten worms about Apple.
I will be back on to support tomorrow about this.
EDIT: I just re-read what you wrote and actually, you can only transfer the GC ID to a NON existing email account (just to be clear I mean to apple, the email can exist just not in any apple accounts anywhere). That is, the whole process of the transfer creates a NEW account and can't be tied in to any account but then adds it to your account when done. If so you get 'Account is already in use'. That part I had itunes support delete my partners apple id to have try this all out (she wasn't using it anyways so nothing lost there). Doing the transfer adds the new email addy to your account but it sets it as primary for the account. (As I said if yours is the primary like mine is for GC and the AppleID)
I believe the whole transfer is worth staying well clear of for now. The issues we had were bad, but I managed to get everything back the way it was albeit many password changes later.
Message was edited by: gene77