They are joined by the 2010 winner of the Fred Award, 7 Days regular and star of TV3's comedy series Golden, Jesse Griffin and British comedian Chris Martin - who is not Gwyneth Paltrow's husband or - even more famously - the former Black Caps fast bowler.
"When there's a whole bunch of dudes sitting in a van together the comedy tends to write itself," Gilmour said.
"Comedians all get on reasonably well, we all have do-nothing jobs really."
Gilmour said he was born in Rotorua Hospital in the same ward as Temuera Morrison and his mother.
"But Tem tells me it was his brother.
"The funny thing is, up until I was five or six, I thought I was part Maori, being born in the homeland of Maori culture.
"I always thought I was a Maori being raised by a pakeha family and I was a little disappointed to figure out I wasn't," he said.
The Comedy Convoy heads to Rotorua's Civic Theatre on Tuesday May 14. Tickets are available from the venue or at www.ticketmaster.co.nz. For details visit www.comedyfestival.co.nz.