Sales on the Xbox 360 are almost double that on the PS3.
The milestone has been reached in just over 10 years since the release of the first Gran Turismo title.
Its record setting debut week is followed by a strong second - only 22% down on week 1.
Bigger than the launch week of all five previous Wii Mario titles combined.
Despite a 40% drop in sales Sony's Gran Turismo 5 Prologue is still the dominant title.