In simuls, yes.
Any of you play a GM?

sounds rough, I kinda hope that happens to me I haven't been crushed by anyone in awhile
A friend got to play Karpov in a simul, a few years ago in Reno. That was the peak of his chess career.

I have faced many GMs OTB
Ftacnik - South Carolina Open 2008 - Round 3
Tatev Abrahamyan (WGM I believe) - 2003 US Open - Round 7
Sulskis - 2003 US Open - Round 1
I'm sure I can find others if I think about it, but those 3 come to mind first.

I have faced many GMs OTB
Ftacnik - South Carolina Open 2008 - Round 3
Tatev Abrahamyan (WGM I believe) - 2003 US Open - Round 7
Sulskis - 2003 US Open - Round 1
I'm sure I can find others if I think about it, but those 3 come to mind first.
Did you beat any of them?

I have faced many GMs OTB
Ftacnik - South Carolina Open 2008 - Round 3
Tatev Abrahamyan (WGM I believe) - 2003 US Open - Round 7
Sulskis - 2003 US Open - Round 1
I'm sure I can find others if I think about it, but those 3 come to mind first.
Did you beat any of them?
No!
Highest win - IM (Alexander Matros - Aug 2010)
Highest draw - IM (Stephen Muhammad - Aug 2007)

i played GMs in simuls, played NMs and FMs in tournaments. i had an FM beaten and i thought he had resigned, but was hoping to get my flag to fall, which it did.
still, had a few nice results against FMs and NMs.
nice beating an FM is pretty good. I think I'm going to start entering tournaments girl and see how I do I think I could prob win a few.

It is fairly easy to encounter GMs if you play simuls or fast chess.
I played a GM when I made a challenge on chess.com and a GM was one of the players who accepted. I played Black in all games.
Also played against a GM in a US Open otb.
Also I challenged a very strong team in internet chess and The #2 player in ICCF Correspondence chess USA rating list was the top player on that team--the game lasted a year.
Also beat the #3 player in the USA ICCF Correspondence chess rating list.
So 4 current GMs but one deceased now RIP.
My very first tournament game I had Black and played against an expert in the US Open in 1959.

I've played 2 or 3, depending on whether one of them counts for purposes of your question. In college, the advisor of our chess club was Milan Vukcevich. He only reached FM in OTB play because he devoted his life mainly to teaching as a university professor, but he was clearly GM strength. Here's where it gets fuzzy: he was a GM of chess composition, considered one of the best problem composers ever. If he counts because of his composing GM title, the number is 3, because we played dozens of games at the club though never in a rated game.
One evening at the chess club, his old friend from Yugoslavia -- GM Svetozar Gligorić -- came to visit. I played a game against him at G30. Again, not rated. Gligorić won, to the surprise of nobody.
The only rated game against a GM was in 1992 in a tournament in Maryland. He was a minor GM from the Philippines whose name I don't even remember. I had never heard of him and haven't heard of him since. I played so badly that it's embarrassing to think about it. Unfortunately, my scoresheets from those days were lost somewhere along the way, so I'll never know who that GM was.
I haven't yet but I would love to I bet it would be fun