They made their debut in the 2000 All Japan Grand Touring Car Championship with the Ferrari F355.

In 2007 the team changed to the Ferrari F430, which was completely designed and manufactured in-house by GAINER itself.

In 2009, Tetsuya Tanaka and Katsuyuki Hiranaka raced with the team achieving a win at Autopolis along with two other podium finishes.

They managed to finish 7th place in the standings, achieving another win, this time in the season opener at Okayama.

GAINER switched cars once again, this time using the Mercedes-Benz SLS AMG GT3 for the 2013 season.

11 car of Hiranaka and Wirdheim, took pole position at the final round in Motegi and took the win,[1] despite having the same amount of points as champions GOODSMILE Racing, it finished second in the drivers' title after losing a tie-breaker as they had less wins.

[2][3] In 2018, GAINER became an official Nissan team, retiring the SLS, replacing it with another GTR.

[7] Additionally, GAINER set to return with a GT300 version of the Nissan Fairlady Z with Ryuichiro Tomita and Keishi Ishikawa as the drivers for car number 11.