Google Play Game Services now has cross-platform turn-based and real-time multiplayer support for iOS, Android and REST!
I think this is great news! No more rolling your own server or using expensive third party services for cross-platform multiplayer games.
I wonder how long it will take to add the new GPS SDK to Corona?
Voting up a feature request can’t hurt!
Good idea, I just added my 3 votes.
I would also encourage people to vote for this as well:
While I don’t currently have a need for real-time multiplayer with GameCenter, I think it would be great to have access to as many native GameCenter and Google Play Game Services features as possible.
More cross-platform Google Play Game Services info. The new services look really cool! Unity already has a plugin for it 
As well as the Java and Obj. C SDKs there is also a cross platform Google Play Games C++ SDK:
https://developers.google.com/games/services/downloads/
2014 GDC Google talk on the new GPGS SDK:
https://www.youtube.com/watch?v=kQcLfjZ5GDk
Thanks for posting that video. Very interesting!
Voting up a feature request can’t hurt!
Good idea, I just added my 3 votes.
I would also encourage people to vote for this as well:
While I don’t currently have a need for real-time multiplayer with GameCenter, I think it would be great to have access to as many native GameCenter and Google Play Game Services features as possible.
More cross-platform Google Play Game Services info. The new services look really cool! Unity already has a plugin for it
As well as the Java and Obj. C SDKs there is also a cross platform Google Play Games C++ SDK:
https://developers.google.com/games/services/downloads/
2014 GDC Google talk on the new GPGS SDK:
https://www.youtube.com/watch?v=kQcLfjZ5GDk
Thanks for posting that video. Very interesting!
Anybody else need turn-based multiplayer support for Google Play Game Services? I need it badly. If you can spare some “feature request” votes, PLEASE add some at the link below. Much thanks!
Anybody else need turn-based multiplayer support for Google Play Game Services? I need it badly. If you can spare some “feature request” votes, PLEASE add some at the link below. Much thanks!
Sorry for bumping this again. I was hoping it would make it into the latest public release (2014.2393) and it did not. If you can spare any “feature request” votes, please add some to the requests below. Thank you! 
Turn-based Multiplayer and iOS support for Google Play Game Services
More cross-platform goodness for Google Play Game Services:
http://android-developers.blogspot.com/2014/10/updated-cross-platform-tools-in-google.html
Sorry for bumping this again. I was hoping it would make it into the latest public release (2014.2393) and it did not. If you can spare any “feature request” votes, please add some to the requests below. Thank you!
Turn-based Multiplayer and iOS support for Google Play Game Services
More cross-platform goodness for Google Play Game Services:
http://android-developers.blogspot.com/2014/10/updated-cross-platform-tools-in-google.html
Bumpity bump… C’mon everyone, we need those votes! By the way, Rob, or anyone else at CL: Any updates on this? I know you may not be able to disclose anything about in-progress updates, but thought I’d ask in case you’re able to. Keep up the good work!
Turn-based Multiplayer and iOS support for Google Play Game Services
This is on the list of things we would like to get to but we haven’t yet. I’ve not heard of us working on it either. More votes would be good.
Rob
Thanks for your reply, Rob. That’s a bummer that it’s not in the pipeline yet. I agree that we need as many votes as possible. I did notice that as of right now, this feature request is the #7 most requested feature. I think it would be a very valuable addition to Corona SDK.