Whincup was ecstatic with his win.
"It took a while - what a relief," he said. "We have been trying to get a win this year - it is bloody tough. Scotty's thing is a rocket but we dug deep and I'd like to think we deserve this one."
McLaughlin battled the Townsville heat with a failed cool suit was content with second.
"I lost my cool suit so that was tough so that was tough. Well done to Jamie. He is so consistent it was only a matter of time. Absolute champion drive - we had nothing for him."
After a terrible round at Darwin three weeks ago van Gisbergen was happy to be back in the mix.
"Pretty awesome job by the team," he said. "We lacked a bit in qualifying but turned them around for the races."
Fabian Coulthard's shocking weekend stretched into Sunday. After a lowly finish on Saturday that saw him lose his championship lead, Coulthard again qualified poorly Sunday. He got caught up in a tangle with Tim Slade and Craig Lowndes on the opening lap and was eventually given a 15 second time penalty for causing Slade to spin.
The New Zealander dropped to the back of the field after serving the penalty at his first pit stop. He eventually finished 21st.
"One to forget," Coulthard said. "I know my guys are trying their best but we couldn't get on top of the car.
"A little bit of work to do so we will go back to the drawing board and try and come back for the next one."
Prodrive Racing Australia's Mark Winterbottom finished fourth with teammate Chaz Mostert fifth, backing up a solid run on Saturday in an improved showing from the Ford outfit.
Championship Standings
Scott McLaughlin
Jamie Whincup -6
Fabian Coulthard -158
Shane van Gisbergen -231