The Gunners claimed a famous victory over Borussia Dortmund at the start of November, and in doing so became the first English side to win at Westfalenstadion in the Champions League.
"I really appreciated being there," Gnabry told Arsenal Player. "I think everyone knows about the stadium in Dortmund. It's a fantastic stadium, the atmosphere especially with the 25,000 standing on the side, so it was a really great stadium.
"Arsenal are highly-rated [in Germany]. We are on a good run and we are top of the league so everyone's watching us and looking at how we play.
"They [Dortmund] are second in the German Bundesliga and have been fantastic over the last few years so it was a hard game for us. But the results have been great and that was an important win."
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