I was born in late 1978, and while I was born and raised on TPIR (I may have seen the first airing of Plinko, because I distinctly remember those two-stage "WIN!" reveals,) I have a couple of fragmented early game show memories:
For the longest time, I couldn't place it, but I remembered a show with green triangles, red circles, and lots of bright lights. It wasn't until the late '90s, when a friend got GSN, that I realized I had seen the first incarnation of Match Game. I also have fairly strong memories of the MG-HSH, and I remember thinking, as a child, "This guy hosting Hollywood Squares isn't very good."
I have vague memories of at least one other letter-turner (possibly Susan Stafford) on Wheel. More vividly than anything, I remember asking myself, "Why is that one space worth $175 when all the others end in 50 and 00?"
I have a distinct memory of watching 10 numbered circles blink around a bunch of triangles. Never knew what that was until the internets showed me it was "Battlestars."
And I have a very clear memory of laying down for a nap on a warm, sunny summer day, shades down in my bedroom, and hearing the distinctive clang and buzz of Family Feud coming from the TV in the basement.
So yeah, that's as far back as I go. 1981-82 range. With all this floating in my head, it's no wonder I can't retain anything useful.