Turnbased Multiplayer with Google Play Services

I have developed and tested a 2 player turnbased multiplayer game by looping through my game. I want to disable this looping and use Google Play Turnbased Multiplayer with BaseGameActivity (for Android) to find players and pass game data. My problem is, the Google Play plugin does not provide the required interfaces to get player information and pass game data. I've read everything on Google Play but it doesn't get me there without additional programming. Can this be done without creating my own plugin's. I find the tutorials on generating plugin's sorely lacking. I'm an experienced programmer but not with js or html5.

Have you considered using the official MP plugin instead? I'm not sure whether MP plugin can be used together with synchronous sign in into google play but it would be lovely if someone can confirm whether this is possible.