https://www.cnet.com/roadshow/news/google-maps-apple-carplay-ios-12/

One day after iOS 12 dropped, Google released the update to its Google Maps iOS app that enables CarPlay functionality. After you update both your phone and your app, you can finally stop pretending that you love Apple Maps more than any other navigation app.

I took Google Maps in CarPlay for a quick spin earlier. What surprised me was that, upon opening Google Maps, I was met with a familiar sight -- the design of Google Maps in CarPlay is almost identical to Apple Maps. But that shouldn't surprise me, given Apple's very tight control over what goes into the CarPlay environment, a reason that Apple told me in the past is for safety's sake. Google likely had to sacrifice some of its own UI in order to let Apple give up its monopolistic control over in-car navigation.