Is there a way to add a folder for Google Maps custom icons?

Hi there, I am trying to setup the Google Maps plugin and one of the things I would like to do is add a library of map icons. I’ve enabled the ‘Custom Icons’ add-on and I’ve added the folder into my themes directory, but I’m not sure if there is any option to directly add the entire folder to the plugins features so I don’t have to add each icon one by one?