Rinse fish thoroughly, and pat dry. Make 3 shallow diagonal cuts in both sides of fish. Brush fish inside and out with melted butter; dust with flour. Sprinkle with salt, pepper, and garlic powder.
Place fish in a well-greased 13- x 9- x 2-inch baking dish; add wine to baking dish. Bake, uncovered, at 450° for 30 minutes or until fish flakes easily when tested with a fork, basting occasionally with pan drippings.
Transfer fish to a warm serving platter. Garnish with lime wedges.