It's not possible in GameMaker: Studio but there are some commands provided by Apple to display a game specific Achievement Page along with the Leaderboards as another. They are not implemented into GM:S... so maybe if enough people want it they will add it. Also when extensions finally do come, someone could probably just write an extension for it.
Also, why would you not recommend it? Just wondering. When you redirect them to the Game Center the last game played is at the top, no? And when you are in said game looking at the achievements and leaderbaords there is a play button at the top right that takes you right back to the app, no?
Edited by alexfislegend, 24 August 2012 - 01:35 PM.