Beginning this fall with iOS 12, Apple will allow navigation apps to work with CarPlay, including both Google Maps and Waze.
The change was announced at WWDC, and — for consumers — could be one of the most immediately useful announcements made during the entire keynote.
Since CarPlay was first introduced a few years ago, Apple has prevented all navigation apps not named Apple Maps from working with CarPlay. This means that anyone who wanted to use an alternative app like Google Maps, Waze, or TomTom was forced to use a phone mount instead of the otherwise very useful CarPlay.
Apple didn't actually say when (or even if) Google Maps and Waze would be available with CarPlay, but MacRumors has reached out to Google and will update if we hear back.