Gunsur was born in 1975 as the second child of a family of Tatar descent (a Turkic ethnic subgroup). His mother, Sibel, was a lecturer and his father, Teoman, was an industrial engineer who graduated from the Middle East Technical University and worked in a nuber of different sectors. His older sister Zeynep Gunsur Yuceil, who is a choreographer of modern ballet, is also a lecturer.

He began his acting career at the age of seven in various commercials. At the age of 14, he appeared in Okan Uysaler's Past Spring Mimoses with actors such as Rutkay Aziz, Filiz Akin and Musfik Kenter. After graduating from the Italian High School, he entered the Marmara University Communication Faculty and graduated with honors. Gunsur gave concerts with a music group and ran a restaurant for four years. With a friend's help, he auditioned for a role in the movie Hamam. After the trial shot, he was accepted for the role and the film was directed by Ferzan Ozpetek. After this film, he decided to turn to acting.

Gunsur got married on 17 July 2006 to the Italian documentalist Caterina Mongio, whom he met in 2004. They have 3 children.

- IMDb Mini Biography By: yusufpiskin

1975 yılında Tatar kökenli bir ailenin ikinci çocuğu olarak İstanbul'da dünyaya geldi. Annesi Sibel Hanım bir öğretim görevlisi, babası Teoman Bey ise bir endüstri mühendisidir. Modern bale koreografı olan ablası Zeynep Günsür Yüceil aynı zamanda bir öğretim görevlisidir.