The writing is on the wall, scanners are a niche item- and now, with the advent of advanced digital radio systems (P25 phase 1 and 2, NXDN, DMR/MotoTRBO, etc), it requires more advanced software, hardware design, and more support. Support and software don't come cheap- and when you add up how many relatively few units are sold, it's easy to see why a company like GRE cannot survive on this revenue alone to open a new factory.
Uniden can, because scanning receivers are just a part of their business- they sell CB radios, marine electronics, security cameras, Bluetooth devices and a ton of cordless phones. I'd venture to say they sell 10 times the number of cordless telephones than scanners any given month.
The continued development and implementation of advanced digital radio systems certainly does have an impact, and yes, that "E" word too on the business of selling monitoring equipment. It isn't 1982. Back then, there were a half dozen companies making consumer scanning receivers (Uniden, Bearcat/Electra (later bought by Uniden), Regency, GRE, Cobra and others). Back then, digital voice was only used by select Federal agencies who could afford it (Motorola DVP/DES)- and trunking was in it's infancy.
I honestly don't see GRE coming back- and Radio Shack was their last high volume customer, the fact that Pro197's still sit in numbers on shelves unsold 1-2 years after being made speaks volumes, I doubt RS will continue to carry scanners at all, and if they do, they will just order them from Uniden.
Sorry to sound like "that guy", but our hobby is not going to be as easy as it was in coming years. You will have to make do with what is available now, or develop your own using SDR chips and software decoders for the new digital formats, which are now ignored by the lone scanner manufacturer, unless someone like Icom gets involved. Or use LMR radios programmed as receivers.
I think GRE has faded into history.