I first got GSN in September 1997, so I saw the last several weeks before the initial G-T lease expired. I missed those shows a lot, but I do have a lot of good memories from the months that followed: staying up late on Saturday nights to catch Hot Potato, Chain Reaction and Pass the Buck, watching $20K Pyramid early weekday mornings and Break the Bank on Sunday evenings, and the eventual addition of Cullen and Kennedy TPIR on Sunday afternoons.
The schedule itself wasn't "dark" so much; the bigger concern was when/whether GSN could get the G-T library back. Around March 1998, when the little promos started airing with teases like "What's in the cards at Game Show Network?...", I was certainly happy, but the 1997-98 schedule was a good game show education in itself.