Hello Aspirant,

Yes you could register for GATE 2021 in MA psychology as the registration application is out on the official website gate.iitb.ac.in or directly at appsgate.iitb.ac.in. The last date for registration is 30th September. I'm providing below an link for you through which you could know more about GATE 2021

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

Hope this helps

Thank you