Hi gangumolu,

Hope you are doing great as per the question asked by you 80 marks in entrance can certainly land you on  your desired branch and even on your desired course because no of seats are around 600-700 in gitam. Now coming to rank as such rank is not provided cutoff certainly depends on your marks even 48 marks can land you to a seat in gitam.

Hope you found this answer useful.Stay motivated stay positive.

All the best!