She won the silver medal at the 2024 World Athletics U20 Championships in the 400 metres hurdles.

[1] In 2022, at the U18 Polish Indoor Championships, Gadajska won the 60 metres hurdles with a time of 8.26 seconds to become the Polish U18 national record holder, improving the previous record held by Pia Skrzyszowska.

[2] In July 2023, she reached the 400 metres hurdles final at the European Youth Summer Olympic Festival in Maribor.

[3] In May 2024 in Warsaw, Gadajska improved the Polish national U20 record for the 400 metres hurdles, running a time of 57.07 seconds.

[4] She won silver in the 400m hurdles at the 2024 World Athletics U20 Championships in Lima, Peru in August 2024 with a Polish national under-20 record time of 56.87 seconds.