The googlemaps node module @sunilp mentioned only gives you static maps, which are easy to build without relying on a lib, just search for google maps api static maps (don't have enough reputation to post more than two links).
For Android you have this:
https://github.com/teamrota/react-native-gmaps
For iOS there's this, but it cautions it's a work in progress (it also hasn't been updated in months): https://github.com/peterprokop/ReactNativeGoogleMaps
Looking around, it seem your best (supported) bet for iOS today is to use React Native's own MapView if you search their docs. Then, you can make fetch calls to the Google Maps API services for the data, then populate MapView through its interface. Make sure you pass in your key and use https in your url otherwise the service will deny your call:
fetch(
'https://maps.googleapis.com/maps/api/directions/json?origin=41.13694,-73.359778&destination=41.13546,-73.35997&mode=driver&sensor=true&key=[YOUR_KEY]'
)
.then(
(response) => response.text()
)
.then(
(responseText) => {
console.log(responseText);
}
)
.catch(
(error) => {
console.warn(error);
}
);
`