Finally! iOS 12 Lets You Use Google Maps or Waze in CarPlay
Before iOS 12, Apple Maps was the only mapping app you could run on the dashboard in a CarPlay-equipped automobile. But Maps doesn’t always work well and some people prefer directions from Google Maps or the Google-owned Waze. Once you upgrade your iPhone to iOS 12 and update to the latest version of Google Maps or Waze for iOS you’ll be able to use those apps on your CarPlay screen.