Son of Inge and Igor. Gelb was born in Russia on July 24, 1996. He grew up in Russia until the age of seven, and the family immigrated to Israel in 2003. On June 6, 2006, Gelb, a resident of Kiryat Yam, was drafted into the IDF. He served in the Ordnance Corps. Gelb fell during his service on the 20th of Tevet 5771 (December 30, 2016.) He was laid to rest in the military cemetery in Haifa, leaving a mother.