My GR page is an author page and is attached to my biz pages (for my books on FB). I think there is a way to do all that once you're a GR. It's in the control panel. When I did mine, I was able to chose which of my pages I wanted the GR thingie to show up on. Yeah, it's still there. I have it on my main page:
https://www.facebook.com/DemonKissed There are boxes that say LIKE, JOIN MY LIST, etc - click the down button and the GR ap is there. If you click it, it shows all your books data on GR.
So, it sounds like you're doing it right. Set up the author account and add your author page to it and you'll be set.