A few months ago, I posted about how you could use the Elk package to bring GIS data from Open Street Map into Dynamo. Open Street Map is a great resource if you do not have access to other GIS data. But if you do have other GIS data, such as shapefiles, then Elk is not very useful.
However, there is another package that can import shapefiles into Dynamo: DynamoGIS. For some reason, this package does not appear on the package manager website, but you can find it if you search the package manager from inside Dynamo.