The 27-year-old has experience playing in England, previously with Brighton and Coventry.
He is eager to make an impact with his new team, saying: “I want to score goals and be a part of this club.”
Gyokeres believes he has improved since playing in England before and wants to prove himself on the biggest stage.
He also mentioned his experience playing for Sweden, saying it was a big honour to score goals for his country.
Gyokeres is looking forward to playing with the talented players at Arsenal and is excited to get started.