I was cleaning my room today and found my old 9006 5k Mcchulaahaha(bah) HID bulb and I happen to have the oem fogs on my room too.
I looked at them closely and found out that the bulb/socket for the fogs are the similar as a 9006 bulb which what the GTS low beams use.
Good News: It fits. a 9006 HID bulb(mcchulaaa) fits.
Bad news: not projected but bulb is covered with metal plate, have to trim the edges of the bulb/socket alittle bit but you'll see it and all you need is some cheap cutter and trim just a little bit.
Ill try it when I get my car back from the autobody shop.