Yes, this dish can be made ahead of time and stored in either the refrigerator or fridge.  Uncooked cheese enchiladas can be assembled, covered, and stored in the refrigerator for 3-4 days, or in the freezer for up to 3 months. For the best texture, I recommend waiting until you are ready to bake to add the chili gravy and extra cheese.  Leftovers that are already cooked can be stored in the refrigerator, in an airtight container, for 3-4 days.