GGN stoppage wont go away even after Bijwasan terminal.
GGN and GZB are uncomparable as GGN is just a mainline station while GZB is a big junction with multiple lines parting away.
Hence, GZB already has large number of trains connecting it thru out India. While GGN has only limited number of trains passing to Gujarat and Rajasthan. Thats why GGN gets halt...
more... of all trains, while GZB gets selected trains only, if IR starts to give all trains a GZB halt then imagine the congestion it will create for all trains coming from different directions.
Therefore, IR template would remain the same to give DEC and GGN halt for all Rajasthan, Gujarat, Maharashtra bound trains.
GZB will have to fight it out for stoppages.