Gërguri was born in the village Siboc near Podujevë, in southern Kingdom of Yugoslavia, present-day Kosovo.
All mural paintings in Sinan Pasha Mosque are characterized with virtuous, spiritual drawings and a wealth of rare colours.
In accordance with the decision of the Institution for Urbanism and Protection of the Monuments of the Culture in Prizren, on 21 September 1972, Abdullah Gërguri started work on the conservation and restoration of mural paintings in the mosque.
During the 10th anniversary of the creation of the Institute for the Protection of Cultural Monuments in Prizren, he was awarded with a certificate for outstanding work.
He was on different specializations in Croatia, Slovenia, Bosnia, etc., and to gain more knowledge about the achievements on the conservation of the monuments, he visited Italy, Albania, Turkey and Greece.
Painter Gërguri also used to copy Orthodox Christian frescoes and icons in his spare time while he was working in different churches in Kosovo.
Among these are: 'Saint John', 'The Girl with the Pot' (Patriarchal Monastery of Peć), 'Portrait of the Apostle', 'Jesus of Prizren', 'A detail from the Secret Supper' (Saint Prenia, Prizren), 'Saint Mercury', 'Saint Mary on the Throne' (Hoçë e Madhe), 'Saint Nicolas' (Kabash), 'Detail form the icon' (Dečani) etc.