Don't want to re-flash, so do I just try to use Mopidy?

All I want to do is stream my Google Play Libary. I’ve got other stuff already installed, configured and running on my Raspberry; so I don’t want to deal with Musicbox and reflash my SD and lose that.

So am I correct in trying to install Mopidy and get that going?

Yes. There are some raspberry pi specific instructions in the mopidy
documentation should you need it.

Thanks.

Do I need to install Mopidy-GMusic extension if I plan to stream my Google Play library?