Cherry-topped Cheesecake

Ingredients 1-1/2 cups graham cracker crumbs (about 24 squares) 6 tablespoons butter or margarine, melted 1 envelope unflavored gelatin 1/4 cup cold water 1/4 cup milk 1 package (8 ounces) cream cheese, softened 1/2 cup confectioners' sugar 2 teaspoons grated lemon peel 1 carton (8 ounces) frozen whipped topping, thawed, divided 1 can (21 ounces)