The GT600's racing debut came at the Estoril round of the Spanish GT Championship on 17 July 2011, where Unzurrunzaga ran the car under the Blue Jumeirah Team banner. Competing in the GTS class, he finished 14th overall, and sixth in class. Unzurrunzaga then switched to the Red Bull Ring round of the International GT Open, but was unable to start either race. Two months later, he returned to the GT Open, competing in the Catalunya round; having missed the start of the first race, he could do no better than 24th overall, and tenth in the GTS category, in the second race. Unzurrunzaga was classified eleventh in the Spanish GT Championship's GTS Driver's Championship, with six points.