Gnatowski was born in
Ruda Śląska,
Poland, on 24 May 1961, and grew up in
Zabrze, where he attended elementary school and high school. In 1985, he graduated from the
AST National Academy of Theatre Arts in Kraków. Soon after his graduation, Gnatowski appeared as Pyzo in a play which was an adaptation of the novel
Ferdydurke by
Witold Gombrowicz, directed by
Maciej Wojtyszko for
Teatr Telewizji. On 20 December 1986, he made his debut as Mieczysław Walpurg in the drama "Madman and the Nun" by
Stanisław Ignacy Witkiewicz, directed by
Krzysztof Jasiński in
Theater Scena STU in Kraków. Gnatowski was associated with this theater throughout his acting career. In the years 1987–1988 and 1997–2001 he also collaborated with
Ludowy Theatre in Kraków. In 1988, he first appeared on the small screen, appearing in the first episode of the series
Crimen as a member of the staff sect. In 1994, he made his debut on the big screen, when he played Barnabas in the film
Miasto prywatne ("Private City"). In the 1990s, he hosted programs for children in
TVP1, such as
Włóczykija Guide on tourism and history, or
Words, words and half-words, a game show about the Polish language. He appeared in the movies
Ferdydurke (1991),
Myasto priwatne (1994),
Dzieje mistrza Twardowskiego (1995),
Sara (1997),
Młode wilki 1/2 (1997),
Demons of War (1998),
With Fire and Sword (1999),
Anioł w Krakowie (2002) and
Zakochany Anioł (2005). In 2002, Gnatowski, who had been struggling with
obesity since an early age, wrote the book "Diet without sacrifices", promoting a healthy lifestyle, together with Michał Mularczyk. In the years 2015–2020 he was the director and re-enactor of the main role in the educational play "Słodki drań", presenting the issues of living with diabetes. Gnatowski appeared in over twenty TV series between 1988 and 2020, including
Tatort (1996),
13 posterunek (1996),
Świat według Kiepskich (from 1999 to 2019),
Na dobre i na złe (2003 and 2014),
Pierwsza miłość (2006), and
Pasjonaci (2019–2020). ==Death==