Hello Sidharth,
Yes, you are right the cutoff is 600. You can definitely get the admission in IIT Bombay with this stream.
For the details of GATE cutoff for NITs & IITs, please go through the links given below and choose your college accordingly if you want
https://engineering.careers360.com/articles/gate-cutoff-for-nits
https://engineering.careers360.com/articles/gate-cutoff-for-iits
https://engineering.careers360.com/articles/gate-cutoff-for-iit-bombay
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All the best.