Happy,
Most Ford GT owners avoid 2nd gear for the first 3 to 4 minutes after startup. The majority of Ford GTs will grind when shifting from first to second until the transmission gets up to operating temperature. There is nothing wrong with the transmission, the 2nd gear grind when cold is just an odd characteristic. It's best to avoid that and the car has plenty of torque so shifting from first to third even at low RPMs is fine.
Chip