[1] In July 2021, he began basic training with the Austrian Armed Forces.

[4] He took part in the Games in the -73 kg weight class as well as in the mixed team (together with Katharina Tanzer, Lubjana Piovesana, Michaela Polleres, Wachid Borchashvili and Aaron Fara).

[5] In the individual competition, he had to admit defeat after a victory against Hasan Bayan (SYR), Akil Gjakova (KOS).

[7] For his participation in the Olympic Games, he was awarded the Nidan by the Austrian Judo Association.

[8] In September 2024, it was announced that Gaßner was part of the customs sports squad.