An F85 X5M wheel specs are:
- 5x120m wheel bolt pattern
- 74.1mm wheel hub
The G11 7-series wheel specs are:
- 5x112mm wheel bolt pattern
- 66.6mm wheel hub
- 8.5"X20" w/25mm offset (front)
- 10"X20" w/41mm offset (rear)
G11 7-series 20" tire specs are:
- front - 245/40/20
- rear - 275/35/20
The G11 wheels have a totally different wheel bolt pattern and hub size. So to mount F85 wheels onto a G11 would require some augmentation to get the wheels to fit.
I would have to run the tire specs through a tire size calculator to see if the 285/40/20 tires are equivalent. Here's a link to a site that will allow you to compare the two tire & wheel sizes to see if there's too much poke (toward the fender) or too much inset (toward the suspension)...as well as give you info about height and width:
www.willtheyfit.com