Hello,
It will be difficult to point out the exact cut off but according to the information available regarding the previous year cut off we can know a range in which the cut off will be. The cut off for each year varies according to the number of candidates, difficulty level, category . Here I have listed out the cut off for SC category corresponding to each year:
1)2019-5791
2)2018-5119
3)2017-4966
You can use the Gate college predictor to predict your rank. Here is the link: https://engineering.careers360.com/gate-score-predictor .
Hope this helps you.
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