hello aspirant,

when you registered for gate 2020, there  should be a OTP send to your registered mail id and mobile number. you need to give the otp code during the form filling. if you have not the OTP code for your mail id please check the spam messages and all inboxes and trash box. check also if there is any option for resending the otp. unless your otp verified your application will not submit. hope you have understand.