Stop rolling your eyes at people, boy.He is far from overrated.
Gourcuff is a brilliant footballer with shitload of creativity. Shame he is not the dynamic type of players who have loads of pace and move allot. (Like Arshavin or Nasri) but he is fantastic, i think his game would suit Chelsea the best (replacing Lampard) and he would do wonders in Italy or Spain.
I rate him very highly but he's not as good as some people think (like you with Kun Agüero).
He will never be as good as Zinedine Zidane.
Also, his off the ball movement is one of his strengths.