Can GD be Tweaked to do this?

Hi Paolo/Stiofan/everyone else:

I’m loving GD on my current site (and as soon as I can afford to, I’ll be renewing my subscription). I now have a new project concept that I don’t think GD is capable of out of the box, and I’d like to see how simple you think it would be to modify GD to accommodate.

Basically, I want to use the places for businesses where I will have a product on display, and certain users will be responsible for refilling that product in those locations. When a new location is added and/or stocked, the location should display with a “green” icon (or some specific icon to distinguish it). After a determined period of time, perhaps two weeks, that location’s icon should turn “yellow,” and two weeks later, turn “red.” This needs to happen automatically, to display on the map where locations need to be stocked with the product.

The users need to be able to “refresh” the location, which turns it “green” again. This lets other users know that the location has been stocked.

Can GD do this, or can it be modified to do this?