Hey,
The GATE cutoff for IISc Bangalore is the opening and closing rank within which admission will be offered by the institute in M.Tech course. The cutoff is different for different courses and categories.
The cutoff changes every year depending upon the number of candidates appearing in the examination,the category etcetra.
Since you haven't mentioned your category,so it's difficult to predict your chances.
However, you can use the link given below to find your chances:

Hope this helps.
Good luck.

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