Gunselman began racing in various West Coast series before moving to the Winston West Series, where he won the Most Popular Driver award in 1996. That same year, he made his NASCAR debut in the
Winston Cup Series at
Sonoma. He qualified 43rd and finished 36th in the No. 35 Race Stuff/Olson Technology
Ford Thunderbird. He would qualify the next year, picking up sponsorship from
Caterpillar, Inc. after
David Green's entry failed to qualify. Gunselman attempted two races in Cup in 1998 in the No. 37 and No. 58 cars, but failed to qualify for both of them. Gunselman also was invited to compete in Japan's Suzuka Thunder 100 in both 1996 and 1997. Gunselman would return to competition in 2000 driving for
Brevak Racing in the
Craftsman Truck Series. He crashed out of his debut at Cicero, and had two twenty-sixth-place finishes in the next two races. In
2001, he joined
MB Motorsports and picked up sponsorship from Waterloo Tool Storage. He drove seventeen races that season with a best finish of 16th at
Kansas Speedway, as well as including an additional start at
Texas Motor Speedway for
Troxell Racing. He started out 2002 with MB, but was released after three starts due to sponsor conflicts between Waterloo Tool Storage and Sears Craftsman brand as Waterloo builds the Craftsman tool box brand. This opened the opportunity for Carl Edwards to join the Mittler Brothers team. Gunselman then took his sponsorship to DF2 Motorsports. After making a few Busch Series starts for
Brian Weber, Gunselman hooked up with DF2 Motorsports and ran fourteen races with the team, his best finish a sixteenth at
Talladega Superspeedway. He would move to
Day Enterprise Racing the following season, and qualified for every race. He had an eighteenth place finish at Talladega and finished 21st in points at season's end. Gunselman began
2004 by running the first two races of the season for
MacDonald Motorsports, Gunselman and Chris Edwards formed Mach 1 Motorsports and started competition in the third Cup race of the year at Las Vegas. Mach 1 went on to attempt all the remaining Cup races that year. Gunselman remained out of the drivers seat until the middle of the year, when he ran five races for
Mach 1 Racing in the
Lucas Oil Ford Taurus, where he failed to finish higher than 33rd. Gunselman sold his interest in Mach 1 to Edwards at the end of 2004. He attempted to qualify for the
2005 and
2006 Daytona 500 for
Ware Racing Enterprises, but did not make either race. After spending 2007 out of the sport, he returned to the Nationwide Series in 2008 when he was hired as the driver of the No. 91 Chevy for
MSRP Motorsports, but was released after ten races. Shortly afterwards, he was hired by
Derrike Cope to drive his No. 74
Dodge Ram in the Truck Series, and later by
Johnny Davis to drive the No. 0
Chevrolet Monte Carlo in the Nationwide Series. Following the 2008 season, he formed
Gunselman Motorsports, which fielded the start-and-park No. 64
Toyota Camry in the
Sprint Cup Series for parts of three seasons. After the 2011 Daytona 500, Gunselman partnered with
Front Row Motorsports to purchase the No. 37 and No. 64 teams he owned. Under Gunselman the 37 team attempted every event in 2004 with 39th place finish in the owners standings. In 2012, Gunselman fielded the No. 37 with the intent of
Timmy Hill going for Rookie of the Year honors, but parked the team after one crash and five DNQs. Max Q reformed the No. 37 in July 2012 fielding Chevrolets for
J. J. Yeley through a technical alliance with
Tommy Baldwin Racing. ==Motorsports career results==