OnGui not getting called

i was trying to test the built in gui but it will still isn't getting called

 var collected = 1;
 var total = 1;
 function OnGui ()
     {
         GUI.Box (Rect (0,0,100,50), collected + " of " + total);
         Debug.Log("working");
     }

i already attached it to a game object set said game object's position to (0, 0, 0) and made sure my camera had a gui layer, and i still cannot figure out why it wont call.