How can I add floor plans to Google Maps View

I am doing a project for class modernizing our school's map of campus as an android application. I plan to include indoor floor plans for our buildings including multiple floors. I saw the ground/tile overlays in the google maps API and it sounded like this could be used for floor plans, are these anticipated to be used for indoor floor plans and is there a method for switching between floors using these? Is there any better method of creating floor plans for Google Maps? I have had trouble finding any good documentation on how adding floor plans works for Google Maps so if anyone has any references to that it would be appreciated as well.