Preheat the oven to 325°F. Combine graham cracker crumbs, melted butter, and ¼ cup sugar in a bowl. Press into the bottom of a 9-inch springform pan and bake for 10 minutes. Let cool.
In a large bowl, beat cream cheese until smooth. Add pumpkin puree, ¾ cup sugar, eggs, vanilla, cinnamon, nutmeg, ginger, and salt. Mix until smooth.
Pour the filling over the cooled crust and bake for 50-60 minutes until the center is set but slightly jiggly.
Mix sour cream with a tablespoon of sugar and a splash of vanilla. Spread over the cheesecake and bake for an additional 10 minutes.
Turn off the oven and let the cheesecake cool inside for 1 hour with the door slightly ajar. Refrigerate for at least 4 hours before serving.