"I crashed into him on Saturday, which wasn't too good for our friendship but I went down and saw him," the Red Bull Racing Holden driver told Radio Sport.
"I just made a little error passing him. I turned in a little early and bounced off the curb into him. My mistake there but he was pretty livid about it until he saw the footage where I had mucked up.
"I think he had thought I had just driven into him."
The two Kiwis put that behind them on Sunday as they completed top six finishes in the main race.
"It is cool to have a couple of Kiwis up there in fast cars and the potential for other Kiwis to be up there as well," Van Gisbergen says.
Van Gisbergen now leads the championship while fellow Kiwi Scott McLaughlin has jumped to fourth in his Volvo.
The next round is at Bathurst.