No. you don't have to necessarily prepare a resume for NITIE PGDIE GD/PI. Instead, you will be required to fill out your application form carefully. Every minute detail regarding yourself has to be filled in as the interviewers will be probing questions based on the application form only. The interviewer will have a soft copy of your application form with them.
It's highly advisable to prepare questions regarding your work experience project or internship project if you are a fresher.
One of my friends has recently been in the GD/PI session conducted at NITIE for the course of PGDIE and elaborates the scenario better. Here is what he says,
Hope this helps answer your query, wish you all the best!