
Puerta was signed from Bogotá FC in January 2023 and initially loaned to FC Nürnberg in Bundesliga 2. Puerta made ten appearances for the Werkself in the Bundesliga and the Europa League in 2023/24.
"Gustavo will continue to progress, he's a very talented player as a six or a number eight," said Bayer 04 sporting managing director Simon Rolfes. "We think he will develop really well at Hull."

Ecuador international Piero Hincapie, who moved to Arsenal FC on loan from Bayer 04 Leverkusen for the 2025/26 season, will join the English champions permanently on 1 July 2026.
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Bayer 04 Leverkusen CEO Fernando Carro will lead a club delegation to Brazil from July 2-6 for a program of partner engagement, community activities and football development initiatives across São Paulo and Rio de Janeiro.
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In glorious sunshine and temperatures of around 30 degrees Celsius, the Bayer 04 Women have begun their preparations for the new season. With a relaxed first session at the Kurtekotten training centre, coach Roberto Pätzold’s team became the first Bundesliga side to resume training after a 37-day break.
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Black and Red stand out. Under the slogan ‘Diversity under the Cross’, Bayer 04 took part in Pride on the Rhine at the weekend alongside the queer fan club “Bayer 04 Junxx”. The club mascot, Brian the Lion, and several members of staff were also in attendance, championing diversity and solidarity.
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