Gonzalo Luján

San Lorenzo

Luján came through the San Lorenzo youth teams. He made his debut in the first team on 26 May 2021 against Chilean side Huachipato FC in the Copa Sudamericana. Later that season, after a succession of substitute appearances, he made his first league start against Newells Old Boys. Luján signed a new contract with the club in December 2021, agreeing to a one-year deal. In March 2022, Luján renewed his contract with the club, signing on until December 2024. The new contract came just 92 days after the previous deal, and came after negative feedback from the fans that the club had only agreed a one-year deal, initially.

Inter Miami

On 16 January 2025, Luján signed a three-year deal with Major League Soccer side Inter Miami for an undisclosed transfer fee. When he signed for Inter Miami, he reunited with his former coach Javier Mascherano from the Olympics. He would make his debut coming on for Benjamin Cremaschi in Inter Miami's opening match against New York City on 22 February it resulted in a 2–2 draw. He would get his first start for the team on 2 March in a 4–1 win against Houston Dynamo.

In November 2023, Luján was called up to the Argentina national under-23 football team by coach Javier Mascherano. In June 2024, he was named in the provisional Argentina squad for the 2024 Paris Olympics.

As of match played 16 March 2025

Inter Miami

MLS Cup: 2025 Campeones Cup: 2026