An ardent Turkophile, he adamantly advocated for the revitalisation of Ottoman–Polish relations and was a staunch supporter of the Ottoman Empire, viewing it as Poland's only historical ally.

He was an avid supporter of the Young Turks, a political reform movement in the early 20th century that favored the replacement of the Ottoman Empire's absolute monarchy with a constitutional government.

[7] In the Second Constitutional Era, Gasztowtt worked as a renowned journalist in numerous Istanbul-based pro-Committee of Union and Progress (CUP) newspapers.

[9] Gasztowtt convinced the Young Turks to organise celebrations in August 1909 in memory of the thousands of Poles who had served the Ottoman Empire in the Crimean War, especially Adam Mickiewicz.

Widely regarded as Poland's greatest poet and writer, Mickiewicz served in the Crimean War under the auspices of the Polish Legion in Turkey, and died in Istanbul.

There were many notable attendees, such as the future last Caliph of the Ottoman Empire Abdulmejid II, a CUP delegation consisting of high-ranking members such as Doctor Nazım, Rıza Tevfik Bölükbaşı, Selahaddin Bey, veterans of the Crimean War, colonel Halil Sami Bey, and Gasztowtt's close friend Celal Nuri İleri.

Further notables were secretaries general of the World Zionist Congress Nahum Sokolow, and Polish Committee in Istanbul Michał Grabowski, as well as Leon Walerian Ostroróg, a delegation from Adampol, and the owner of Mickiewicz's house, Marcin Ratyński.

Bulletin Polonais branded the event as a "real lesson of tolerance" with many Muslims and Imams attending the mass and sacrificing lambs in remembrance of Poles who died.

The Tanin newspaper also celebrated not only Polish soldiers who had died in the Crimean War but those who had served the Sublime Porte for years, to underline the historical basis of Ottoman–Polish cooperation.

[22] In 1914, Gasztowtt was appointed as the Secretary of the newly established Ottoman consulate general in Salonika, which the country had lost during the Balkan Wars.

After meeting with Mustafa Kemal Atatürk in April 1921 in Ankara, he successfully had the Polish government establish a permanent diplomatic presence in Turkey.

Gasztowtt was appointed as the First Class Secretary of the Polish delegation to Turkey on 29 December 1922 but was dismissed from his role on 30 November 1923 and sent to Poland for unknown reasons.

[26] The book was very well received at the time since it provided people with information surrounding Poland's relationships with Turkey and Islam in general, especially post-Partition, that was rarely known.

[29] In both books, Gasztowtt gives his opinion on many issues surrounding the Ottoman Empire, and held a very pro-Ottoman view in regards to their conflicts, advocating for the country to defend themselves against the expansionist European powers.