To export your Google Maps starred locations:
Go to Google Bookmarks: https://www.google.com/bookmarks/
On the bottom left, click "Export bookmarks": https://www.google.com/bookmarks/bookmarks.html?hl=en
After downloading the html file, run this script on it to generate a KML.
It's hacky and doesn't work on all of them, but it kinda works.
Hey! Just a quick heads up: I packaged it up a bit with a proper
requirements.txt
and put it up on https://github.com/heyarne/bookmarks-to-kml. I hope that's fine. If it's ok i'd also like to build a simple web interface around it, but because of the missing license file I didn't want to do it without permission. Any objections?