Yes, the hub is identical
Same 5x114.3 PCD and same 66.1 mm centre bore: wheels from Nissan GT-R axe arrière bolt on and centre on Infiniti QX55 without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Nissan GT-R axe arrière is compared with the one from Infiniti QX55 of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
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10.5Jx20 ET25 · 285/35R20 — Check on the car
Compared with the original ≈7Jx20 ET44 on Infiniti QX55: shock absorber side +25.5 mm, wheel arch side +63.5 mm, tyre diameter −0.4 %.
Comparison for guidance only (estimated width). Check in detail
Before fitting the wheels
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Infiniti QX55 (Ecrous - 12x1.25), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.
And the other way round: wheels from Infiniti QX55 on Nissan GT-R axe arrière?