I'm not sure I like this idea: a huge reason I have a Graphene OS phone is that it completely lacks all of the Google services (an awesome side-benefit of which is that I can go a WEEK without charging the phone when it's in standby mode). If I needed Google Play I would use one of my Android handsets... I hope this is optional or at the very least Graphene allows give me the option of a no-Google-Play install like I have now.