Depends on the track...
If it's a smooth, short, tight and twisty track the Ferrari will might have the edge. If it's an open track with a rough surface, lots of elevation chages and long uphill sections, like the Nordschleife the GT2 will have the edge. The GT2 has a very strong chassis, underpinnings and suspension parts, whereas Ferraris are known to be a bit fragile, also the GT2 has about 50% more torque, which toghether with the rear engine and the low point of gravity will pay dividence out of the corners. Like pointed out earlier in this tread: 7:31 for the GT2 speaks volumes...
The Gallardo will need a soaking wet track to get an advantage from the 4wd system.