Showing an aggregate of all Google Maps in a Network on a Main Site

I have a multisite network of stores that each have a "Find Us" page with a map to their own store. I would like a map on the main site in the network that includes an indicator for each map in the network.

I would also like the map to provide results of a radius search showing all the stores within a radius of that zip or postal code.

Does this plugin do that?

Will I need to do any custom coding to pull all the maps into one central or master map?