If you map is named ‘mapp0’ then this code will get the Google Map object for the map:
var gmap = mapp0.getMap();
With that object you can use any API functions. For example:
The plugin will assign names to the maps as they are rendered (mapp0, mapp1…etc). You can also use the ‘name’ attribute of the shortcode to set your own name.
I hope that helps!