even if they issue, they would charge for minimum 200 kms i guess for 2A unreserved... it will be too costly. Rather, (if you are alone or travelling light) buy a GEN class UR ticket, board from NDLS, and show up at GZB in 2A later.
If travelling with family and/or with heavy luggage, still buy UR GEN ticket, board 2A from NDLS, request TTE to accomodate till GZB.