hey praveen,

GATE exam (Graduate Aptitude Test in Engineering) is a computer-based standardized test conducted at the national level in India with an aim to examine the understanding of various engineering and science undergraduate subjects

elegibility : The following students are eligible to take the GATE exam -

• Bachelor’s degree students in Final Year of Engineering / Technology / Architecture (4 year program after 10+2) programs
• Master’s degree students Final Year in any branch of Science / Mathematics / Statistics / Computer Applications or equivalent

Pre-final year students are not eligible to appear in GATE exam. There is no age limit for students eligible to appear in GATE exam.

hope this helps.

good luck..!!!