has anyone done this? which did you do if you did?
http://www.mrashop.de/mrashop/cmsAction.do?idart=258
you would probably be the first.
Those are usually put on motorcycles with more horizontal windshields to create vertical airflow and direct wind above the rider, it's why touring screens tend to be more horizontal but sport screens more vertical. So even in that picture it's not gonna do much since that bike already has a touring style screen. The GS already has a pretty vertical screen, all that's really needed is to extend it like the sport touring screen. The whole idea behind the "double bubble" ZG screens was for super sports where a higher windshield angle improved airflow over the rider who isn't in a full tuck. Except in our case a double bubble, instead of directing airflow up and over, ends up buffeting a bunch of air because it ends up placing the windshield even more forward than necessary because of the already near vertical angle of the screen.