What are the only gambits gms play?

What are the only gambits gms play?

Safe ones, where you don't sacrifice a pawn or a piece

Gambits are usually played by people who don't make a living at playing chess.

Right, I was about to say. 5.b6 and 2.Nf3 will deprive black of a lot of fun, and white doesn't have to take that pawn on b5 either.

You don't say. 

4.Qc2 ( Δ e4 )

As for 3...b5 4.c4 came to mind at first but it seems that 4.Bg5 is being played a lot.

Carlsen played recently vs So the marshal gambit i think its called. It's Spanish game with black d5 instead of d6, sacrificing a pawn after several first moves.

Many Gms play the king's gambit

Have any of you guys seen any of Simon Williams's Otb games?

As post 6 already indicates, post 5 is wrong in saying the Benko is the only gambit both played and declined at the GM level.

Actually, you can expand even further into the QG and another gambit that is both played and frequently declined is the Shirov Gambit. That is the line 5.e3 Nbd7 6.Qc2 Bd6 7.g4 in the SemiSlav Defense.

And if 1.d4 Nf6 2.Nf3 does not avoid the Benoni, then how come 2...c5 3.c4 directly transposes to what is called the Anti Benoni? Most commonly reached from the English Opening, but also reached via d4 and playing Nf3 instead of d5.

What about the Queen's gambit, the Marshall gambit, Muzio gambit (Okay, that's a variation in the King's gambit) or the Saemish gambit?

GMs would play the Marshall Gambit if allowed. Nobody, however, allows either Marshall Gambit. They do not play 8.c3 against 7...castles and nobody at the top plays the Triangle Defense and allow the Marshall Gambit by White, which is 4.e4. Nobody plays the Muzio any more either. 4...Bg7 advantage Black instead of 4...g4. Only time Black should play g4 early on is if White plays h4.

I remember a game of 2003 where Shirov played the black pieces against Goloshchapov. It was a closed Ruy Lopez where white did allow a Marshall gambit. Shirov didn't go for that however.

2003 is ancient history. Also, for every one case where it is allowed by white, there are about a hundred instances where it is avoided. Nothing is NEVER played. GMs play the Colle System OCCASIONALLY. Allowing the Marshall falls in the same category.

Isn't Levon Aronian a proponent of the Marshall gambit?

yea Simon likes to play a lot of gambits at least from what i saw from all of his videos so far. And he has some ineresting Video lessons on video page here. I wish John bartholomew steal an opening or two from Simon.

Could you elaborate on that as my database seems to disagree, unless I am misunderstanding the position you're describing.

Queen's gambit (obviously), Benko gambit in the Benoni, Marshall gambit in the Ruy Lopez at top level. For average GM, they play almost all the classic gambits, although the romantic gambits from the 19th century (King's gambit, Evan's gambit, From's gambit) are quite rare these days.

Besides, top-level GM often play gambit in the late opening-early middle-game stage. Those gambit generally don't have a name. See for exemple how MVL plays the black side of the Sicillian : he very often sacrifices a pawn at some point to activate his pieces and equalise.
For exemple :
http://www.chessgames.com/perl/chessgame?gid=1801787
Game against Giri from the World cup. MVl gave up a pawn with 12. ... Nd7 for counterplay on the a and c file.
The game eventually reached a rook endgame where Giri still was a pawn up. MVL eventually blundered it, but could have drawed had he found the right plan (computers showed it to be a draw).