Do I need to bake my pre-made pie crust?
The pie crust is ready to use.  There is nothing in a graham cracker crust that requires baking, although a little toasting gives some color and deeper flavor.

If you are putting in a filling that will not be baked (a refrigerator pie), you might choose to "blind bake" (bake without filling) the crust for a few minutes to give it more color and flavor, but it is not required.

If your filling will require baking, there is little reason to bake the crust separately.