
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."

Goalkeeper Anne Moll will leave Bayer 04 Leverkusen at the end of the season. The 21-year-old will join second-tier club VfL Bochum 1848 when her contract expires on 30 June.
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Ahead of the conclusion to the 2025/26 season with the Werkself and the World Cup with Argentina, Bayer 04 midfielder Exequiel Palacios answered questions from journalists from the Latin America region. In a digital media round, the 27-year-old, who's been in Leverkusen since 2020, spoke about the "great development potential" in the current Werkself squad as well as his World Cup ambitions with the Albiceleste, among other things.
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Full-back Julia Mickenhagen is leaving Bayer 04 Leverkusen at the end of the season to join Bundesliga newcomers VfB Stuttgart. The 21-year-old’s contract with the club expires on 30 June.
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Werkself-TV shows the highlights of the Bayer 04 women's 3-1 win at RB Leipzig on the 25th matchday of the Google Pixel Frauen-Bundesliga 2025/26.
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