None of the Google Maps / XMP tutorials I've found would work without extensive recoding, so I'm posting the results of my research here. Hopefully someone will find it useful.
The data is very straightforward. I'm creating a searchable map of California State government agencies, but any dataset that includes Lat/Long coordinates will work.
I'm working on two templates, both of which can be downloaded as a TXT file here:
https://files.calcsea.org/?u=aMuq&p=RfSf&path=/XMo...
The main challenge was getting the map coordinates into a Javascript array for generating multiple map markers.
Both of these templates work on DNN 7.2.2 with a Bootstrap-enabled skin, and XMod Pro 3.0.7.
If anyone has any suggestions for improvement, I'm all ears.