Can you cook and eat the grey or white pumpkin like you can the traditional pumpkin? moderator's note: added a more descriptive title to topic
Yes, you can. The skin color doesn't affect the pulp. It is simply a difference in variety. In other words, a pumpkin is a pumpkin! Enjoy your pumpkin pie, pumpkin souffle or pumpkin muffins!
The rind is distinct to cultivar. If the flesh is orange it will most likely taste pretty much like other orange fleshed winter squash. I've fed squash pie of half a dozen different cultivars of hard squash's (while calling all pumpkin) without anyone being the wiser.
