Gate exam is conducted for admission in Mtech .

Almost all colleges use gate score during Mtech counselling.

It's conducted by iits and for getting into iit and IISC you need to score high marks and rank below 600.

https://www.google.com/search?q=gate+exam&oq=gate+exam&aqs=chrome..69i57.1697j0j7&client=ms-android-asus-tpin&sourceid=chrome-mobile&ie=UTF-8

See this link you can also get into psu Navratna government jobs by getting good rank in gate