By Sedara Oluwadara   New signing Gabriel Jesus scored 90 seconds into his first Arsenal game as his double helped the Gunners to a 5-3 comeback win over German second division side FC Nurnberg in Friday’s pre-season game.   Jesus, who completed a £45m move from Manchester City earlier in this summer transfer window, came on at half-time with the Gunners 2-0 down – and made an immediate impact, scoring high in the net from Ainsley Maitland-Niles’ pass.     Egyptian midfielder Mohammed Elneny then hit a wonder-strike to make it 2-2 before two Nurnburg own goals from