In the years 1997–2001, he served as the Ambassador of the Republic of Poland in Hungary, and in the years 2002-2004, he was Vice-president of the “Pomoc Polakom na Wschodzie” Foundation. From 2001 until today, he was the main promoter of the Henryk Sławik’s character – protector of tens of thousands of Polish war refugees in the territory of Hungary, the greatest Polish “Righteous” killed in 1944 by the Nazis in the Mauthausen-Gusen concentration camp. In 2008, the prize-winner co-established – in Katowice – the association “Henryk Sławik – Pamięć i Dzieło” of which he is the Vice-president. Author of the first permanent museum exhibition entitled Henryk Sławik z Szerokiej at the Gallery of the Jastrzębie-Zdrój History (2014).
He is an expert in Hungary-related issues, Polish-Hungarian relations during the Second World War and the Polish war diaspora in Hungary. Author of 10 books mainly devoted to the Hungary-related topics, such as: Węgierski czyściec (1988), Wielogłos węgierski (1994), Polski Wallenberg. Rzecz o Henryku Sławiku (2003), Henryk Sławik. Wielki zapomniany Bohater Trzech Narodów (2008), co-author (with Krystyna Łubczyk) of three volumes of the bilingual (in Polish and Hungarian) album Pamięć. Polscy uchodźcy na Węgrzech 1939-1946. His album Pamięć and the documentary Węgierskie serce present the tragic history of nations in Europe during the Second World War and the assistance received by Poles from Hungarians. After the outbreak of the War, approximately 120 thousand soldiers and civilians found refuge in Hungary. Hungary was the only European country which opened up its borders and hosted refugees. Thanks to the great kindness of the Hungarian authorities, it was possible to transfer almost 40 thousand Polish soldiers and officers to France.
Since 2004 he has also been engaged in producing historical documentaries.
The filmography of Grzegorz Łubczyk:
Henryk Sławik. Polski Wallenberg (TVP 2004), screenplay and direction: G. Łubczyk and M. Maldis, the best film of TVP Polonia in 2004 (Kryształ TVP Polonia);
Pasterz z Kőbányi (TVP Polonia 2005), screenplay and direction: G. Łubczyk and M. Maldis;
13 lat, 13 minut (TVP Polonia 2006), screenplay and co-direction: G. Łubczyk;
Życie po życiu nr 5308 (TVP Polonia 2007), screenplay and direction: Grzegorz Łubczyk;
Anioły Karola Malczyka (OTTO Agencja Producencka Lublin 2008), and direction: G. Łubczyk, screenplay: G. Łubczyk and Father M. Józefowicz;
Węgierskie serce (Religia.TV 2012), screenplay and direction: Grzegorz Łubczyk;
Życie na krawędzi. Henryk Sławik-József Antall senior (Fundacja Dobre Wieści 2014), screenplay and direction: Grzegorz Łubczyk.