I have a GT and the stock screen looks good but actually does very little. It has to be a lot more upright to be effective, so I made myself a couple of brackets to adjust the angle more along the lines of what they do with the Tiger, so the angle of the screen is in line with the forks. Painted the brackets a matching colour and no-one has ever noticed. It works really well too - up to about 85mph, which is more than enough,....
Flyscreen Brackets by
Martin Ward, on Flickr