I have never been to GNT station.....so don't really know if they have any sort of "Buffer land" at hand.....i guess NEW GUNTUR can be considered given it has space to construct a few pit lines and then you have MANGALAGIRI and NAMBURU....what about KRISHNA CANAL??? i guess it's primarily used for FREIGHTERS so i guess we can rule that out.I guess one needs to either post images of those stations or should know about them well enough to provide an answer as to whether any pit lanes can be constructed at those places or may be a "NEW TERMINAL" has to be developed all together.