hi,

see  cutoff score changes every year and it depends on some factors like number of participants, questions difficulty level, seat matrix, your stream, candidates category etc, now if you opt for mtech in structural engineering there is less chances of getting in government colleges as this score since structural engineering is most demanding among civil students.

You may use Careers360 college predictor tool to know your predictable colleges

https://engineering.careers360.com/gate-college-predictor