Preheat the oven to 325°F (163°C). In a medium bowl, combine the graham cracker crumbs, sugar, and melted butter.
Press the mixture firmly into the bottom of a 9x13-inch baking pan. Bake for 10 minutes, then remove from the oven and set aside.
In a large bowl, beat the cream cheese until smooth. Gradually add the sugar and beat until well combined.
Add the pumpkin puree, eggs, sour cream, vanilla extract, cinnamon, nutmeg, ginger, and salt. Beat until the mixture is smooth and well blended.
Pour the filling over the prepared crust and smooth the top. Bake for 1 hour 10 minutes, or until the center is set and the edges are lightly browned. Turn off the oven and let the cheesecake cool in the oven with the door slightly ajar for 1 hour.
Transfer the cheesecake to the refrigerator and chill for at least 4 hours, or overnight. Slice and serve chilled.