Prepare the crust by mixing gluten-free graham cracker crumbs, melted butter, and granulated sugar. Press into a 9-inch springform pan and bake at 325°F for 10 minutes. Let cool.
Make the cheesecake filling by beating cream cheese, granulated sugar, and vanilla extract until smooth. Add eggs one at a time, then mix in sour cream.
Prepare the strawberry topping by washing, hulling, and slicing fresh strawberries.
Assemble the cheesecake by pouring the filling over the cooled crust. Bake for 50-60 minutes until the center is slightly jiggly. Turn off the oven and let it cool inside for 1 hour.
Chill the cheesecake in the refrigerator for at least 4 hours. Spread strawberry jam over the top and arrange sliced strawberries before serving.