I am trying to create a choropleth map in Google Maps to visualize some international country-level statistics. It will be an add-on to an existing Google Maps application.
I searched around and found these potential solutions:
P.S. I just came across jVectorMap. It looks promising (example), except that it is just a standalone map. It would be nice if I can somehow combine the jVectorMap functionality with the Google Maps interface.
As an author of jVectorMap could say that combining of its functionality with Google Maps would be really painful. I think the best solution here would be creation of colorful polygons in GM by hand.
You would be best to go with one of these plugins:
http://leafletjs.com/ or http://polymaps.org/