In a 13x9 pan combine graham cracker crumbs, butter and sugar. Press into the bottoms and corners of pan. Bake in a preheated 325 degree oven for 10 minutes to set crust. Allow to cool.
In a small bowl dissolve gelatin in amount of water specified in recipe, not on box. Chill until syrupy but not set. In large mixing bowl beat cream cheese and sugar until smooth. Add gelatin, mix well. Stir in pineapple. Fold in cool whip. Pour mixture over cooled crust. Chill until set at least three hours.
