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The mystery behind GTV was never resolved. I'm sure it was a Russo idea. IIRC the plan was to have Goldust be revealed as the person behind it (GDTV or GTV = Goldust TV, etc) but he left a few months after it started. GTV hung around because provided a lazy device for knitting together events in the ring and events outside of the ring.
I think they were still using this into the year 2000.