One most important thing, cut off is not only dependent on  your GATE score and AIR but largely depends upon your profile (As in the case of any good other B-school).

last year cutoff  for PGDIE
General 720-750+ 
Obc-540-560
 SC 520-550+ 
ST 450-500+
One more thing that it varies little bit year to year.
Talking about PGDPM and PGDMM, because these courses started last year, therefore, cut off was almost same.

All the best