I got the Chromecast with Google TV and can confirm that the sevenhugs remote pairs to it. However, the back button does not work. The Chromecast with Google TV saw that I had my firestick configuration on the sevenhugs remote, so I paired that and the back button worked. With that configuration, the OK button does not work. This should be a simple fix for sevenhugs to provide support.

After playing with the sevenhugs app some more, I found that there are different variants of the back and ok buttons. After changing the variant, the sevenhugs remote works great with my Chromecast with Google TV!