Hello vasanthkumar,

The GATE 2019 qualifying cut off for your branch general category is 33.5.Only when you qualify GATE you can download the GATE score card  from the official website.The normalised gate score is calculated out of 1000 based on a particular formula.It is calculated so as to ensure that the variation in the diifficulty levels of the question papers for different sessions is accounted.

You may refer to the below link that clearly explains you the normalisation process and how the GATE score is calculated based on the formula

https://engineering.careers360.com/articles/gate-normalisation-process-how-scores-are-calculated