You can turn off Location Services access for Google apps, if you feel the need to run them at all. Adding a few seconds of panning and zooming is a reasonable trade.
> (Google Maps app is) one of the few ways of checking restaurant reviews
Apple Maps has restaurant reviews also, if you can stomach Yelp. Google Maps also works in mobile Safari, if you'd prefer to sandbox Google code from your hardware (and again, you do not need to allow access to your location).
There is no path forward that permits both "I don't accept Google's data practices" and "I allow Location Services for Google mobile apps on my iOS device". :)