IIRC, the GT was not designed specifically for an FIA-sanctioned racing class, unlike the original GT40, originally penned by Eric Broadley, aka Mr. Lola.
It seems that this new car is purpose-derived, like the original.
Superformance builds an improved MkII chassis tub GT40, recognized by the FIA.
http://www.superformance.com/
From 2009, here's a C&D review:
http://www.caranddriver.com/reviews/superformance-gt40-mkii-specialty-file