Yes, they are 16x8s.
However, they are different offsets than the T/A rims. The T/A rims are zero offset for the fronts and something like 20mm??? negative offset for the rears. Real GNX rims are 15mm positive offset for the fronts and 23mm positive offset for the rears.
Positive offset = less backspacing...wheels sit further out
Negative offset = more backspacing...wheels sit further in