Maps are a very important feature to almost every mobile app so we really need this feature to be available on Android.
Please use https://github.com/lelandrichardson/react-native-maps
FYI it looks like react-native-maps is the 'official' community package for cross-platform maps (or really maps in general it seems)
I had great luck with react-native-maps after some initial confusion with MapView that seems present but maybe just a placeholder for Android.
FYI, You may want to look at my cross-platform maps component: https://github.com/lelandrichardson/react-native-maps
I agree and am using react-native-gmaps in the interim