First, let me thank everyone for their replies.
Then let me note that while everyone has in one fashion or another told me how useless the Gevey is, that wasn't my question. I asked if anyone knew what happened to the company. If anyone knows that, it would be great.
FWIW, I cannot get a carrier unlock from Verizon US that unlocks the 4s for other US GSM carriers for a phone I (actually my wife) was given since I haven't had an account with Verizon since analog cellphone days and the person who gave her the phone no longer has a Verizon US account, either. Before I pitch the phone (and with all the other hassles I've experienced with this thing I'm already pretty close to it), I thought I'd try an inexpensive unlock device so my wife can use it on her AT&T US account. But I carefully did not ask anyone here for help with the Gevey device, or for help unlocking the phone - I simply asked if anyone knew what happened to the company that produced this particular device, and that was after doing as much web research as I could.
If it was a mistake to ask that specific question in this forum, I apologize. But it has been something of an education, I admit.