There are no extra functions for the maps other than you see in the pages after you apply the map. If you take a look at the google_javascript folder you can find the wagmp_map_1 file, in here is all of the js and any server side code that is being used by the map. You can add in or edit the map here if you have a specific need that is not accounted for in the wizard.
If you are trying to do a specific thing and would like some advice or info let us know and give us an example scenario that we can follow, we will help you with whatever we can.