Not like Mi Box, the google apps such as Play Store, Google Music are not TV apps on GT1. These apps much like tablet based app and can hardly be navigated by the remote.
Anyway that you can put Google apps for TV on GT1? I want to use the remote to navigate Google Music.
I have tried on several devices to install leanback launcher and other android TV apps without success.
I would recommend you take a look at this thread for a custom rom: http://www.bee-link.com/Beelink-1456-1-1.html
I have installed it on mine, one day after i received my box and i think it's much better than stock.(except some bugs that don't bother me that much)