The first generation of usb gecko's had a flashrom on the pcb. The second generation that is sold now dosn't seem to have it anymore.
Maybe they are using another pld inside that doesn't need the flashchip anymore?
It wouldn't suprise me that the flashchip in the first generation was used so the device could function as gc memory adapter.
As I told before, this are my personal speculations. A lot of software that was available for the first usb gecko's seems to have vanished as well.
It is sold as a debug adapter, and it works well for that.
You might be able to find some cheap sd gecko's on Ebay, which is probably what you are looking for.