Hi @tulikavijay, and welcome to the Plone community!
If you're interested in working with us for the 2018 GSoC, you'll want to get started by learning a bit about Plone, what it is for, how to use it, and how it works. You've taken the all-important first step of speaking up here in our forum. We've outlined a few useful tips on how to get started and you should work your way through those. We are happy to answer any questions you might have, especially if you can dig a bit and look for answers yourself first.
Again, welcome to Plone! We are glad you're here and we look forward to hearing more from you.