Coat a foil-lined shallow aluminum baking sheet with cooking spray; arrange sliced wild mushroom mix on sheet. Bake at 500° until water from mushrooms has evaporated, stirring occasionally (about 5 minutes). Place a prebaked pizza crust on a shallow baking pan. Thinly slice acorn squash; arrange evenly over crust. Brush squash with olive oil; spoon mushrooms over squash. Sprinkle with smoked Gouda and chopped fresh sage. Bake 10 minutes or until top is golden brown and squash is tender. Cut into 8 slices; serve.