The former Formula One driver will be joined in the car by Jan Seyffarth who has been competing in the German GT series for his family-run team.
The newly reformed FIA GT Series is promoted by the Stephane Ratel Organisation and will include six rounds, with the first race taking place in Nogaro, France on April 1.
Chandhok will join Ricardo Zonta as the only two former F1 driver's on the grid, alongside nine-time rally champion Sebastien Loeb.
Chandhok also said that he is close to securing a drive for the prestigious Le Mans 24hrs, where he finished in a brilliant 6th position last year.
Chandhok raced in the FIA World Endurance Championship (WEC) last year with JRM and was poised to continue with the team but they had to pull out due to financial reasons.