I don't see anything really special about Gervinho. Good technique and close control, dribbling is okay but not mind blowing and it looks like he's the type to score all his goals inside the box. I can't see him carving out an opportunity for himself at or trying exploiting small openings to take power shots. When teams sit back he may struggle.
We have to sign him first anyway. If we do, we'll get a better idea of what he can during the Emirates Cup. I'd prefer Benzema though. If he gets his mind right, he has the potential to be deadly.