Hiii Umesh,

Congratulations Your score is good and you can get admission in top IITs. For most IITs cutoff score is about 500 and you have not specified your category.
You are eligible for most of IITs .
To know the previous year cutoffs for IITs and other premier institution follow the link below:

https://www.google.com/amp/s/engineering.careers360.com/articles/gate-cutoff/amp