Hey Aspirant, you will be delighted to know that with such a score most probably you can pursue your M.tech from IIT Bombay.

Cut off for various colleges is not released yet but if we look for the previous year cut off it was about 510 score in Gate for a general category candidate of Electrical branch to pursue M.tech from IIT Bombay.

So hopefully you can manage to get admission in one of the Best IITs in India.

For the previous year cutoffs of other IITs you can refer to the link below:

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

Hope this helps and for any other query regarding this, you can ask me in comments.

Goodluck.