"I've played for three years in Delhi but I think they were not as loyal as Kolkata is for KKR," Gambhir, whose hometown is Delhi, said after the win yesterday.
The 67,000 capacity Eden Gardens was bathed in purple -- KKR jersey's colour -- and was packed to the hilt for the first match of the IPL 6.
The home side did not disappoint, taming Delhi by six wickets with eight balls to spare.
"The crowd is one advantage and can be heartbreaking for the opponents.
It's always a great feeling when you walk on to the field with 70,000 crowd backing you," Gambhir said.
"For me there's no home advantage. It's about playing good cricket. We don't discuss about the wicket in the dressing room," he added.
Gambhir was KKR's top-scorer with a 29-ball 41 in the 129-run chase and he said he always preferred to play aggressive.
"My instincts have always been attacking whatever the format may be. I don't want to be in a mode when I'm looking to survive.
"When you're looking to attack, you're looking to score runs and then you've a better footwork to score runs," he said.