Van Gisbergen's father is Dutch born whilst his mother is from New Zealand, meaning that the player holds both a New Zealand passport and a Netherlands passport. Van Gisbergen qualified to play for England on 11 September 2005 on residency grounds, having come to England three years previously to begin his playing career at Wasps.
He is a former Waikatofly-half in the National Provincial Championship, although he was unable to cement a regular starting position or secure a more financially rewarding Super 12 contract. He played his club rugby for Hamilton Marist for several seasons, often at fullback.
The fullback made his debut for Wasps in 2002 and scored just under 300 points for his club in the 2003-04 Zurich Premiership and the 2003-04 Heineken Cup. He scored over 300 points in the 2004-05 Zurich Premiership and the 2004-05 Heineken Cup and appeared in all but two Wasps matches. In his time with Wasps he played in four victorious Premiership Finals in 2003, 2004, 2005 and 2008. In the 2004 final he scored a conversion, but in the 2005 final he was more pivotal and scored a try, three conversions and five penalties. Then in 2008 he scored two conversions and four penalties.[2][3][4][5] He also played in two Heineken Cup Finals in 2004 and 2007. In 2004 he scored a try, three conversions and two penalties. In 2007 he was a replacement.[6][7]