Iyer is an excellent player of spin bowling. However, his poor technique against the short ball is a cause of worry for the Indian team management ahead of the big games.
Gill (74) and Gaikwad (71) added 142 for the first wicket.
Iyer will be hoping for a better show in the remaining two one-dayers.
India are sweating on the fitness of Shreyas Iyer and Axar Patel.
Shreyas Iyer and K L Rahul have resumed batting in the nets but are not certainties for the Asia Cup beginning in Multan later this month.
Rahul has already started his keeping drills. But keeping for 50 overs with recovering hamstring will be a bit too much, considering India's Asia Cup campaign starts early next month.
A report in ESPNCricinfo says that the BCCI is attempting to fast-track Pant's rehab in order to try and get him ready for the ODI World Cup in October-November.
'Bumrah underwent surgery in New Zealand on his lower back, which was successful and he remains pain-free,' BCCI secretary Jay Shah said in a statement.
It is high time the BCCI stepped in and devised a domestic and international schedule that allows players some period of rest away from the game.
Rana will replace Shreyas Iyer, who is likely to undergo back surgery and is in danger of missing the entire season.