Arsenal completed the deal, which is believed to be worth 18m euros to the Spanish club, after a work permit??was granted for the uncapped Brazilian.??
Costa Rica striker Campbell signed a new Arsenal deal before travelling in the opposite direction on loan until the end of the season.
Gabriel told the club’s website: ???I came from a club that is not that big in Brazilian football.??I went to Spanish football and that was another dream come true, to play in Europe.??
“A while ago I had a really huge desire to play in the Premier League, so since that point I put it in my??head that I really wanted to do it. I had a talk with my family and I told them that it was my dream to??play in the Premier League.
“Getting here to such a big club is so gratifying. I am arriving at a big club and the fans can expect to find a Gabriel with a great will to help everyone.??Not just thinking of me as an individual, because to me that is not important.??
“I care more about helping the team and my team-mates. I want to help everyone, so the fans can expect a??Gabriel that on the field has a lot of will to be able to help the team win important things.???