The GATE 2012 is conducted for majority of the branches during Afternoon of Sunday the 12th Feb.
Hence this time it is supposed top be tough, tougher, because primarily you have to stay awake on Sunday afternoon, which is usually day of rest and of sleep. Even if you are physically awake you have to be mentally awake, that is a tough task, even rubbing Vicks/Amrutanjan on eyelids may not help. If you take chewing gums that may work, I don’t know whether chewing gums are allowed in exam hall.
Best of luck to all.