Looking through the checklist, there seems to be about 12 cards featuring Gary Payton, all of which are GUs and GU variants. My numberings might be wrong, but it's what I could figure out. Let me list them (strike through = I have it, blue = working on it):

Winning Materials
Winning Materials Combos with Jason Williams
Winning Materials Triple with Zo/Shaq
Flashback Fabrics
Winning Materials Stats
Winning Materials Patch Parallel /25
Winning Materials Stats Patch Parallel /25
Winning Material Combos Patch Parallel with Jason Williams /50
Winning Material Triple Patch Parallel with Zo/Shaq /25
Winning Materials Combos Auto Patch Parallel with Jason Williams /10
Winning Materials Triple Patch Parallel with Zo/Shaq /5
Flashback Fabrics Parallel /25

I'm simply putting out the request that, if any of you pull them or know someone who's pulled something, please let me know! I wholeheartedly appreciate it.