The Brazilian is set to sign for the Gunnres from Manchester City in a big money deal.
Video footage has already shown him wearing the no.9 shirt and Arsenal's colors ahead of his official unveiling.
"Arsenal really need a finisher, someone who gets into the box.
"But with the way Mikel Arteta wants to play, I don't know whether a number nine can be like that. That's why Pierre-Emerick Aubameyang was such a good goal scorer. He wasn't a proper nine, he was a number 11 playing off the flanks with his pace.
"I'm very mixed in the Gabriel Jesus debate. Under Pep Guardiola he wasn't a favourite and didn't always play, but if they get him at a decent price, I'd be amazed if he doesn't score at least 20 goals in the league for Arsenal.
"That's what Jesus likes to do. He likes to play around the edge of the box, with a lovely burst of pace, and that's what Arsenal miss. It would be a very good signing if they could nail him down."