[3][5] She had initially agreed to sign for Freiburg in February 2015, rejecting competing offers from Bayern Munich and Turbine Potsdam.

[7] On 25 February 2019, Gwinn agreed terms with Bayern Munich which would see her leave Freiburg at the end of the 2018–19 season.

At the age of 13 years, she was called up by coach Bettina Wiegmann for under-15 national team training in November 2012.

[14] UEFA's technical report noted that Gwinn's pace on the right wing had been a positive feature of Germany's play.

[16] The four Freiburg players in the squad contributed seven of Germany's 10 goals at the tournament and two of them, including Gwinn, successfully converted their kicks in the shootout.

[29] For Euro 2022, which was held in England, Gwinn was a key player for the German national team, starting all six games and providing one assist.

[30] After suffering a second anterior cruciate ligament injury, Gwinn was ruled out of the 2023 FIFA Women's World Cup.

In the summer of 2024, Gwinn helped Germany win a bronze medal in the Olympic women's football event at the Games in Paris.

The defender scored the only goal of the Bronze medal match in Lyon; a 65th minute penalty, as the Germans beat world champions Spain 1-0.