Well,
I just posted Sanford Arms, so I thought I would post this too, as for the spinoff Grady, I have found 3 episodes
1. Sanford & Son Ep 8?2(can't remember which exact number) but titled Family Man where Grady moves in with daughter's family and gives the offensive painting as a gift.
2. Fred Visits, this is the first actual standalone Grady episode, Grady moves in with the famil.
3. Grady learns to Drive, which aired on TVLAnd last year.

anyhow, anybody out there with any other eps or info, please let me know!!