Guntoro was born in Jakarta on May 1, 1987. Before joining Permata Photojournalist Grant 2016, Guntoro, or popularly called Olo, was first exposed to photography through some activities held by Forum Kreativitas. Olo completed his formal study at the Institut Ilmu Sosial dan Ilmu Politik (IISIP) Jakarta in 2011. He worked as a photographer in Koran Jakarta daily until he passed away during a flood news coverage in Pejaten Timur, South Jakarta, on February 16, 2017.