According to BBC Sport, the prodigious young winger will spend the coming campaign at the Hawthorns under Tony Pulis.
“We’re delighted to add Serge to our options,” the Albion coach began, “he is a top player and he will bring us quality in certain areas of the pitch.”
The 20-year-old moved to Arsenal in 2011 when he left Bundesliga outfit Stuttgart.
He was only 16 when he made the move, and has become an increasingly accomplished young talent over the subsequent years.
Stuttgart-born Gnabry has featured for Germany at U21 level, although he could still represent the Cote d’Ivoire in the future, as his father Jean-Hermann is from the country [Sky Sports].
Gnabry made his Arsenal bow in a League Cup match against Coventry City almost three years ago and has subsequently featured 19 times for Arsene Wenger’s first team.
Chelsea transfer news
Manchester United and Chelsea transfer target and potential Angel Di Maria replacement signs new deal
Jamie Carragher: Chelsea manager Jose Mourinho is the NEW Sir Alex Ferguson
The youngster typically features on the right wing, but is a competent operator across the midfield, and may prove to be a valuable asset for Pulis. He will likely compete with players such as Callum McManaman and James Morrison for a spot in the Throstles’ starting XI.
Arsenal have already loaned out youngsters Chuba Akpom, Isaac Hayden, Ainsley Maitland-Niles and Yaya Sanogo this summer, while it remains to be seen whether the likes of Alex Iwobi will also be allowed a temporary departure.