In a small bowl, combine the gingersnap crumbs and butter. Press into a greased 9x13 inch baking dish; set aside. In a large mixing bowl, beat the cream cheese and sugar until smooth. Beat in the pumpkin, cinnamon and vanilla. Add eggs; beat on low speed just until combined. Pour over crust; sprinkle with nutmeg. Bake at 350 degrees F for 40-45 minutes or until center is almost set. Cool on a wire rack for 10 minutes. Carefully run a knife around edge of baking dish to loosen; cool 1 hour longer. Refrigerate overnight. Cut into squares; serve with syrup. Refrigerate leftovers.