Spray a 9" x 13" foil pan with non-stick spray. Dump apple pie filling into foil pan. Sprinkle cinnamon on top of pie filling. Top with cake mix making sure to spread it evenly over the pie filling. Cut butter into small pieces and evenly place on top of cake mix.
Place on grill and bake for 45-60 minutes or until the top is golden brown and cooked through.