[Google Maps API v2] Submit info into a shapefile

I am new to working with google maps API , but have experience working
with GIS, and I am trying to find out if it would be possible to
perform an action with google maps api, or it would be better that I
go with one of the open source online mapping like MapServer or
MapGuide.

My question is:

In Google Maps API, is it possible to have a polygon shapefile in
which a user could click on a shapefile, submit information, and
have the information either 1) return to me as a text file or 2) be
stored onto a database which I could retrieve.

For example, lets say I want the person to select a polygon on the
shapefile that corresponds with a persons house, and have them input
the number of people that live in that house, and then I could see
what they input.....so if John Doe clicks on his house, which is
polygon number 15, and inputs that he has 5 people living that
house, it will either input into a database or send me a text file
that says
"polygon 15 has 5 people living in the house".

Thank you,
Robin

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