If the phone is rooted, you should be able to just uninstall the Google Apps. For good measure, you could also block Google's IP-addresses in the hosts-file. A

If the phone is rooted, you should be able to just uninstall the Google Apps. For good measure, you could also block Google's IP-addresses in the hosts-file. As for ways to use the same device for work and personal, newer Android-versions (I believe from Lollipop onwards) have the option to create different user-profiles. I think that would work, although I've never actually used them myself...