Dear aspirant,
The cut off marks depends upon various factors and accordingly the cut offs are decided and it is subjected to change every year. The cut off usually depends on the number of candidates appearing in the examination, the previous years cut off trends, the number of vacant seats available for the current year.
As far as your rank is concerned , in this rank it is a bit difficult to get cse but you can hope for other non core branches like electronics and communication engineering and eee branch.
For more information you can check out the link given below-
https://engineering.careers360.com/articles/gitam-gat-result/amp
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile