Only two days after [going into beta testing], Google has already released an update to Google Maps, adding support for CarPlay in iOS 12.
Google Maps 5.0, now available on the App Store, will allow the Google Maps app to be displayed on the in-dash screen in any vehicle support Apple CarPlay, providing turn-by-turn directions and other navigation features for users who prefer using Google Maps.
Previously, only Apple Maps could be used with CarPlay, but with iOS 12, developers of third-party navigation apps can now extend their user interface to the CarPlay screen.