Giršas Leizeris Finkelšteinas was born on 8 January 1910 in Marijampolė. He finished a Jewish gymnasium in Marijampolė in 1929 and applied to study dentistry at the Medical Faculty of Vytautas Magnus University in Kaunas. Very likely he did not begin his studies because from 1930 or 1931 he studied at a higher technical school in Czechoslovakia. In 1935, he became a student of chemistry at the faculty of Mathematics and Natural Sciences of Vytautas Magnus University – he started his studies from the fifth semester. During the spring semester he was studying for the examination in the Lithuanian language. In 1940, he repeatedly applied to study chemistry at the Faculty of Mathematics and Natural Sciences of Vilnius University from the fifth semester, and as previously he had been registered as a fifth-semester student at Vytautas Magnus University, his application was granted. Giršas Leizeris Finkelšteinas was expelled from the university on 19 September 1941 on the basis of the Order of 17 September 1941 of the Higher Education Department of the Board of Education that was subordinate to the Nazis. He was imprisoned in Flossenbürg concentration camp during the Second World War; his further fate is unknown.