Is the Grand Prix Attack Good against the sicilian?

Is the Grand Prix Attack Good against the sicilian?

It is playable. It is "good" only against inadequately prepared opponents.

I see against prepared opponents black easily equalize or get the advantage? On the field of below 1900 level, do you see many prepared opponents against grand prix? Thanks.

If Black knows what to do, they can equalize without problems (and there is more than one scheme to use). I wouldn't say "get the advantage," but typically this does happen because often the GPA player will be clueless and get outplayed once Black shuts down their attacking "tricks."

Below 1900 level, just about anything is fair game.

Below 1900... so that would exclude you, since you are just above 1900.

My advice to OP, have a go at a thematic tournament, get a feel for the common lines that are played. You might want to look deeper into it afterwards, you might not, but either way you'll know why :-)

There is nothing wrong with it, i'm sure a search would find many GM games playing the white side.  A very common player who played it was IM Lawerence Day.

With Bb5 it can be dangerous, Bc4 is not dangerous if black knows how to play against it. 

As a Sicilian player I find the GPA to be one of White's least challenging side-systems to face. Certainly I think the Closed is a better option.

It leads to OK positions and Black won't be familiar with them. I would recommend it as better than the open sicilian (not at GM level, of course), but it's a great weapon for amateurs

No, it's free equality with 2....d5 3.exd5,Nf6 4.c4,e6 And black wins the d4 square.  Just play 2.Nc3 first to avoid that crap. 

Of course, 2.f4 is not the correct order

1.e4 c5 2.Nc3 Nc6 3.f4 and Black should just play 3...g6 4.Nf3 Bg7 5.Bb5 Nd4 6.0-0 a6 followed by 0-0,e6,Ne7,d5 in some order, for a good game. Depending on what White does of course.

How I usually like meeting the closed Sicilian depending on the move order with great play for both sides:

The Grand Prix proper is of course no problem because black breaks with d5. Of course, after Nc3 white gets his desired centre with e4 and f4. As such there is nothing wrong with it, except white may find his c1 bishop hemmed in by the f4 pawn and there is less room for clever knight hops as well. 

If you play a real Sicilian with a later f4 you still get the central majority, the difference is white gets slightly more space. That is probably why the open Sicilians are more popular.

Oops, was dyslexic above, meant white's two pawn islands to black's three obviously. 

Yes, any opening, played properly, should lead to an OK game for Black. That's kind of what my point was - these moves should be Black's general plan to get a good position from the opening.

Black could play inferior moves, and get a difficult game, surely, so all openings do not lead to a good game.

Again, yes, White has a few options, and Black shouldn't move on autopilot, but I fail to see why this is the "key", as you put it. Far from it - in my opinion, Black should be able to get these moves in against a variety of White move orders and be excellently placed, and this is why I hold the opinion that the GPA is not White's most dangerous line.

I love to play against the smith morra.