The Brazilian is a new signing from Lille and is likely to be one of the team's starting center backs.
And he hopes to play with veteran countryman Luiz, who Gabriel looked up to and played with on video games.
"For sure David is an example, he is a player I admire very much," Gabriel told Arsenal Digital.
"I was always a big fan of him and everything he achieved.
"I watched him since I was a kid, I played video games with his character and today it is a dream come true to be here with him and hopefully play next to him soon.
"It is always good to have Brazilian players at the club to welcome me, it is very important for me. I don't speak English very well and I will try to learn as fast as I can.
"Nicolas Pepe is also a good friend of mine, also David they messaged me and welcomed me, this is very important to me and makes me very happy. I cannot wait to meet the rest of the squad, Willian and Gabriel Martinelli too."