"They have got the control and they have got the quality and if they play for Arsenal then that means they are very good," said Gallas.
"I am happy for them because when I was the same age as them I don't think I was at a big club like Arsenal. It is a joy to work with them everyday."
However, Gallas' former Chelsea boss, Jose Mourinho, thinks the lack of older players in the Arsenal squad will prevent them winning the title.
"I would put Chelsea, Manchester United and Liverpool as favourites again to win the Premier League. Arsenal also have a great team, but I'm not sure if the group have enough experience and quality to win," said the Inter Milan manager.
"I see nobody else to win the Premier League, but Tottenham surely have the quality to fight for a top-four finish.
"I cannot say who the surprise team will be, but we always wait for a better Newcastle. They are a top club, they have huge support and they have good players, so we wait for more from them."