A "GTS" is a GS bios and GS card factory-clocked at GT speeds. It lists as a GS but performs like a GT.
Anyways, I stuck with the default drivers for a little while (88-somethings) but tried the recent drivers for a bit (91.47). These drivers I got off the eVGA website, as that's the brand of card I have.
Anyways, for 91.47 it works. It's not perfect, though. Every "dot" on the radar map is actually twice as wide as it is long. That is to say it's not square, it's rectangular. This includes when it is highlighted due to vox (it becomes a larger rectangle).
There are probably other bugs as well. However it seems to work in all games pretty well. I'm going to test 93.71 next