This is covered in their FAQ: "Is it possible to install the Google Play Store? Yes, this is generally possible. However Google doesn't allow anyone to ship i

This is covered in their FAQ: "Is it possible to install the Google Play Store? Yes, this is generally possible. However Google doesn't allow anyone to ship its applications as long as the device is not certified and the vendor didn't sign an agreement with Google. The Anbox project does not have any interest in shipping the Google Play store and we're not allowed to do so. We may add an easy way for our users at a later point which allows easy distribution of Android applications suited for the Anbox runtime environment."