Trick question. The answer is that he still is, and will continue to do so for a little while longer yet. (click to enlarge).
The short version is KG's original trade in 2007 just generated another two future First Round picks, via the Al Jefferson trade. But I'm counting five current (for now) roster slots being taken by folks who came directly or indirectly via that trade, with more still on the way. Thanks, KG!