What to do in case of lost of your admit card and you need in the interview

There is a option of duplicate admit card and  the information of that is provided in the given link-:

http://www.gate.iitb.ac.in/gate2013/post-exam/

And the following things you have to done

-A Demand Draft for 250.00 drawn in favour of the “Registrar, IIT Bombay” as a fees for the duplicate scorecard.
-A self addressed A5 size envelope affixing postal stamp worth Rs. 40 on it. 
To the “Chairperson, GATE 2013, Indian Institute of Technology Bombay, Powai, Mumbai 400076″

It should take not more than 10 working days to process the request after the request is received in the GATE Office.