Are pumpkin sprouts edible?
Looks like it might be. According to The Self Nutrition Data (© Condé Nast):

This food is very low in Cholesterol. It is also a good source of Calcium, and a very good source of Protein, Vitamin A, Vitamin C, Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Iron, Magnesium, Phosphorus, Potassium, Copper and Manganese.

And there are proposed ways to cook them.