Demo based on - Build Mobile Apps With Flutter and Google Maps (Cloud Next '19)

You'll need to enable google maps services in a google cloud platform project and create an api key to access the services. After that, you'll have to insert your api key in 3 files inside the project (just serch for "api_key_here"). The files are:

• "api_key.dart"
• "ApiKey.m"
• "AndroidManifest.xml"

You'll have to replicate the database and data within Firebase's Cloud Firestore. Cloud Firestore is pretty straightforward and you won't have a hard time replicating the database shown in the demo on youtube, I guess :)

Just in case, here's a screenshot shot of my sample Firestore database:

I hope this helps!