Looking at the 270 degree awnings - they would have to be mounted quite high - above the roof line as the rear doors extend almost to the top of the roof.
That may be a problem for those with height of garage door concerns.
I would prefer to have the awning mounted low, just above the gutter on the side of the roof rack. Maybe utilising the rack mounting brackets. Height under the awning would not be a problem for me with the G being so tall. But this would mean a 180 degree awning....
But until I see one in the flesh it is hard to say.