You could try growing the seed indoors in a pot, but I doubt you would have room for the vine once it gets some size on it.* You don't say where you live or your hardiness zone so it's impossible to say if planting it outdoors would work.* Here's a site with all kinds of info on pumpkins, though I doubt you'll find your situation here.
Have a Happy Thanksgiving!
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.