- First, update your iPhone to iOS 12 - this is essential for getting Google Maps to work on CarPlay. Now update the Google Maps app if it hasn’t automatically done so on your phone. Once done, go to Settings > General > CarPlay on your iPhone and select your car. You will see an app screen where Google Maps will have appeared. If you don’t want it to be on page two of your in-car display, drag the icon onto the home screen as you would any app on your phone. Plug the phone into the USB port in your car - or connect it wirelessly if you have that option. You will see the CarPlay screen appear with Google Maps available. Tap on Google Maps and you can set your destination in much the same way as you could on Apple Maps.