Manish, which study of Gann you are talking of. There are various kinds of Gann studies like, Gann Angle, Gann Square of Nine, Gann Wheel etc etc.
Though I have heard that Gann Square of Nine gives good result, but never followed it on a regular basis. Yes, Gann Angle gives very good results, provided you know about it. I tried to learn it, but didnt get any help on it (about my queries on its set up etc), then gave it up. But it is my wish, to learn it one day.
BTW DPKaur is an expert in Gann Angle.