Bremen revealed, via their official Twitter feed, he would be unveiled in a press conference, where he expressed how pleased he is to join the club:
Sky Germany's Marcus Jurgensen shared footage of his unveiling:
Metro's Oli Price-Bates believes Arsenal should have kept him:
The 21-year-old had one year left on his deal with the Gunners, whom he joined in 2011. Gnabry made just 18 first-team appearances for Arsenal in that time, scoring once.
He spent the first half of last season on loan with West Bromwich Albion, but after failing to make an impact at the Hawthorns—he made just three appearances for the Baggies, two of which were in the League Cup—he was sent back to Arsenal in January, where he subsequently failed to get on the pitch.
The youngster's fortunes changed at the 2016 Rio Olympics, where he finished as the joint-top scorer in the men's football tournament with six goals.
Per Goal's Chris Wheatley, he was voted as Die Mannschaft's best player:
His efforts earned Germany a place in the final, and he converted his penalty in the shootout defeat to eventual winners Brazil. Gnabry and Co. did not leave empty-handed, though, even if they were forced to settle for silver.
According to Bleacher Report UK's Clark Whitney, the youngster had to overcome fitness issues to do so at the Games:
A pacey winger, he showed he can be lethal in the final third as he cuts in from the left. Gnabry is versatile, too—he can play on the right and provide cover centrally if needed.
He never had much opportunity to shine at Arsenal, but his new side can help him kickstart his career.
Indeed, at Werder, he will likely face less competition for places, and so he should get the game time he needs to develop if he's to reach his potential.
Former footballer Jan Aage Fjortoft did not understand Arsenal's decision to let him go, though:
The Gunners' loss will be Bremen's gain if Gnabry is able to kick on at the Weserstadion, where he'll look to supply the likes of Claudio Pizarro and Max Kruse.
The German side narrowly stayed up last year and will be hoping to avoid a relegation scrap this year—Gnabry could be the man to make the difference.