Grease a slow cooker with nonstick cooking spray. Place potatoes into the bottom of the slow cooker in a single layer if possible. Add chicken broth. Place pork loin, fat side up, on top of the potatoes.
Mix together garlic powder, onion powder, salt, pepper and paprika. Mix well and sprinkle on top of pork loin and potatoes.
Cover and heat for 6 hours on low making sure the internal temperature is at least 145 degrees. Just before serving, prepare gravy as directed on the back and pour over the top.