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Nobody is quite sure where the “GNDN” acronym came from or what it actually means. Was it a corporation? A copyright? A software protocol?
Whatever it was, the “GNDN” designation often heralds the presence of amazing advanced technology from the peak of high humanity. GNDN can be found emblazoned on circuitry, cybernetic technology, stenciled on ducts, you name it. It's a safe bet that Pax Machina knows what GNDN means, but good luck getting it to tell you.