Hello Ashish,

Specific last year cutoffs for VLSI and Communications are not available. For cutoffs of the 2017 year, you can use below link

https://engineering.careers360.com/articles/gate-cutoff-iit-guwahati

These cutoffs are based on no. of students applying for counseling. But the most important thing now is to check if you are eligible to apply for counseling.

According to the official site, the score required to be shortlisted for counseling for SC category should be equal to or more than 400 for communication as well as VLSI course.

for more information visit http://www.iitg.ac.in/eee/admission2019/MTech/Qualifying.pdf

Good Luck!!