Hi Aspirant

The notification is out but it gate registration might not be yet.It will start very soon because on 2nd and 3rd feb gate exam was conducted and on 9th and 10th exam is yet to be conducted.

Once this process finishes you can apply directly on the website of IOCL.Here you can read the entire process of applying.Visit the link below to see the detailed advertisement.

https://www.iocl.com/download/Detailed-Advertisement-Open-Recruitment-through-GATE-%202019.pdf

You need to keep on checking the website until the gate application starts.

Hope this helps you.