Gill was dismissed in the 25th over of the innings when Neil Wagner bowled a deceptive in-swinger that later seamed away from him.
Virat Kohli and Ajinkya Rahane put on an unbeaten stand of 58 as India battled to 146/3 when bad light forced an early end to the day, with only 64.4 overs of play possible.
Put in to bat under an overcast sky, Rohit added a solid 62-run opening stand with Shubman Gill before New Zealand eventually dismissed both to leave the session evenly balanced.
Pakistan became the fourth team after India, West Indies and Sri Lanka to win all major ICC trophies.
Virat Kohli-led India will look to win the WTC final as they lock horns with Kane Williamson's Black Caps from June 18 to June 22.
There are a number of key individual match-ups that could well be the difference in Southampton.
Australia’s Marnus Labuschagne is the top run-scorer, with 1675 across his 13 matches in the tournament.
Indian Legend Dilip Vengsarkar feels India is a better team, but New Zealand will have an advantage in the World Test Championship final.
The ICC World Test Championship cycle saw India losing only one of their six series from 2019 to 2021.
Yuvraj pointed out that it's important that the two India openers assess the conditions and take it one session at a time.