There has been some work on using Geographic Information Systems (GIS) for family history and genealogy but it is crying out for more so I wish to encourage your efforts.
For example, I just googled and found Mapping Your Ancestry with Google Maps.
My own efforts so far have been based on using different GIS software:
- There is an exampleExamples of a Story Map Journal being used for Family HiStory Mapping are:
- StoryWilliam & James Slight - Map Journal being used for Family HiStory MappingEngravers & Test Cricketer as well as; and
- The Billins knew Captain Charles Sturt
- How to create the above can be learned from an eLearning video tutorial on Making Family HiStory Maps using ArcGIS Online available at:
- Making Family HiStory Maps using ArcGIS OnlineDiscover Spatial that teaches the techniques involved.; and
- Udemy
- You can also see an early end product using ArcGIS for Desktop on YouTube as William Slight: Engraver at Map Office: A Family HiStory Map.
In terms of importing GEDCOM there are some Open Source GEDCOM Parsers available and this blog posting led me to a Python GEDCOM Parser on GitHub that I started to investigate a year or two ago but have back burnered my efforts on for now.
Disclosure: I am the author of the ArcGIS examples and tutorial linked above