The Gers' midfielder praised the influence that the supporters had on their performance as they defeated nine-man Celtic 3-2 at Ibrox despite having a man of their own sent off
The Gers won 3-2 to delay their rival’s title celebrations thanks to goals from Sone Aluko, Andy Little and Lee Wallace.
And McCulloch, who joined the Ibrox side from Wigan in 2007 said the result was a reward for the supporters, who have seen their club slide into administration and fall 18 points behind their fierce rivals.
"We'd been saying in the lead-up that we needed to give the fans something back," the 33-year-old said.
“You could see the passion from them today. The manager touched on the need to be professional before the game. We were deserving winners.
"The most important thing now is the future of the club."
McCulloch’s teammate Lee Wallace also paid tribute to the club’s fans and admitted that the Gers were keen to prevent Celtic winning the title at the own stadium.
"It's massive [to stop Celtic]. We knew what to expect and that the atmosphere would be electric,” said the former Hearts man.
“We went out and gave a big effort so thanks to the fans."