Arsene Wenger had revealed he expects new signing Gabriel to fit in easily to the English Premier League.
Gabriel, who signed from Villareal during the week, is expected to make his debut against Aston Villa on Sunday.
“His great quality for a defender is his level of concentration,” said the Arsenal manager. “He is physically capable of adapting to the Premier League because he’s a good size and quick as well.
“He commits well into challenges and he’s young, just 24, a good age for a defender.
“Maybe it will take some time to adapt completely but overall it is very good to have him.
“This season he has played every game for Villarreal and we have seen him many times. We are convinced about his quality.
“He is very ambitious, focused and serious. That is important at a club like ours. You need to have a complete focus on your job. He has that.
“I like players who come from nowhere and show they can adapt. From Brazil, he has adapted to Spain. That means he has already made it and adapted in another country, and so that is another important quality.”