Hello aspirant!!

It's good that you got a thought to prepare for GATE in 2nd year itself. Start your preparation from now onwards. Take coaching or study under the guide of experts. GATE exam is of 100 marks. It comprises of questions related to Maths, Aptitude, Verbal Ability & core topics. You try complete to complete the GATE syllabus by your 3rd year so that you can get more time to practice and revise the topics. Practice as many previous years as possible. Plan a effective strategy and implementation it. Make a timetable and follow it. Every year in the month of February most probably any of the IITs will conduct GATE exam. The eligible candidates are B.E/B.Tech students.

Though GATE rank you can getting M.E/M.Tech admissions in reputed colleges like IITs, NITs, Government College's and Private Colleges. Also, you can get job in Central Government, State Government ,Public Sector Undertaking (PSUs), Private Companies, etc. 

For more details go through below links.

https://engineering.careers360.com/articles/how-to-prepare-for-gate/amp

Thank you.