Er, the info's right there on your own link!
"Created to contest the inaugural FIA GT1 World Championship this year, the Nismo-prepped GT-R GT1 underwent a series of development tests in 2009, including participation in several events including Silverstone, Spa and Zolder.
This year, two teams — Swiss Racing Team and Britain's Sumo Power GT — have signed to field a pair of cars each in the GT1 championship series, with tech support provided by Nismo."
Love to see the GT-R return to Le Man after so long. However, dont have to wait too long to see it turn a wheel in anger, it will be at Silverstone on the 1-3 of May. Plus you've got to fancy its chances against it's competition