The Siren Board

Hello I got a question, I am working on a siren map of South Dakota and Im using google earth pro. I don't want to start over on regular Google maps, so here's my question.
Is there a way to import the map of SD while doing updates on here or will I have to go to ragular google maps?

You should be able to export the map as a kml file in Google Earth, and import it into Google Maps.