Using GooglePlayOSS on a PC & HTML 5 Distribution?

I’m trying to find a leader-board solution for a project being deployed to HTML5, PC and Possibly Mac.

I’ve looked a good bit into Google Play and Steam, but we aren’t planning to publish to Steam and are also planning to put the game in HTML5 if the experimental nature doesn’t give us too much grief. As a result, Steam doesn’t seem like the best option, and the Google Play services seem really great because of their REST API, but I was wondering if it’s possible to use the included GooglePlayOSS in UE4 for a Windows PC project (or Steam for an HTML5 distribution) if we’ll to handle the GooglePlay REST API directly. Any information helps. Thanks in advance.