Joshi Bhai,
What you have seen in Gir is a marsh Crocodile(Crocodylus palustris).It stands nowhere near a normal adult saltwater Crocodile(Crocodylus porosus).
This particular saltwater Crocodile may be the one of largest ever seen ,it is simply a Monster and an object of study.

Romulus Whitaker,while in search of world's largest crocodile, has written that he has seen the broad back of an 18 footer(5.5. m) monster crocodile in swimming position in contiguous Bangladesh Sundarbans.

He would have been happy to see this one.Thanks for sharing.
Kind regards,SaktiWild