Unfortunately no. IOS Game Center can be used in IOS apps only. Google Play for IOS that is quite new service. Honestly a haven't seen product that used Google Play in IOS game. But: 1) If Google has created this service with Android / IOS/ Windows 8 support, that mean it shouldn't be any problem on app review. 2) That is really cool to have Cloud data, Achievement and LeaderBoards shared between Android and IOS devices. 3) Im currently developing few projects with will support Google Play Service on IOS, as option of course. And this support already agreed with publishers.