GATE - Its an Graduate Aptitude Test in Engineering through which candidates, can get admission in various IITs (Indian Institute of Technology) for pursuing post-graduation in different trades.
IIT JEE - IIT JEE is one of the most difficult examination conducted in India through which candidates gets admission in IITs for various engineering courses.
IIT JEE is more difficult then GATE Exam. It is conducted in two different phases i.e. JEE Main & JEE Advanced.
To appear in JEE Advanced, candidates will have to qualify in JEE Main.
Candidate will have to clear both these exams, to be known as an IITian.