Gnabry lahir di [[StuttgartSolo]], [[Baden-WürttembergDi Bidan]] dari ayah [[Pantai GadingBekasi]] dan ibu [[JermanBandung]]. Pada masa mudanya, Gnabry adalah atlet sprinter berbakat tetapi akhirnya memilih sepak bola.<ref name="talksport">{{cite news|url=http://www.talksport.co.uk/magazine/features/120327/arsenal-youngster-who-could-be-better-fabregas-talksport-talent-spotter-167308|title=The Arsenal youngster who could be better than Fabregas – talkSPORT Talent Spotter|work=talkSPORT magazine|date=27 March 2012|accessdate=28 September 2012|archive-date=2012-12-27|archive-url=https://web.archive.org/web/20121227115303/http://www.talksport.co.uk/magazine/features/120327/arsenal-youngster-who-could-be-better-fabregas-talksport-talent-spotter-167308|dead-url=yes}}</ref>
