No! If you wish to get the EWS reservation for GATE you need to provide your category details on the year of application. So if you have provided the EWS category during the registration of GATE 2021, then you would have get his facility.

For more information you can also consider contacting the GATE help desk:

http://gatehelpline.com/

I hope this answer provides you some insight. Wish you a great eve!