Thanks louis. The snippet of build.settings you posted earlier is the correct one right? I believe mine is fine.
I found that i run older version, maybe it didnt support game center yet. Its from 2013.
After i install the last build 2014.2189, it seem to work.
But now i have to change lots of code to readjust everything. And try the game center again afterwards. Oh my…
Well anyway i thank you.
Louis! Thank you so much!
I had thus wrong brackets too! When i delete them, everything worked fine!
I think this issue should be added to the GPGS tutorial. Spent few hours serfing and serfing about this -.-
I am glad i could help! 
Louis! Thank you so much!
I had thus wrong brackets too! When i delete them, everything worked fine!
I think this issue should be added to the GPGS tutorial. Spent few hours serfing and serfing about this -.-
I am glad i could help!