G.V. Ovchinnikova has been educated at Chemical department at Leningrad State University. She graduated in chemistry with honors in 1953. Since 1953 – researcher at Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Leningrad/St.Petersburg. 1964 - PhD degree in Chemistry.
She is pioneer in Rb-Sr, K-Ar and U-Pb geochronology of USSR. She determined 87Rb decay constant by chemical approach.
Scientific interest: isotope geochemistry of sedimentary and metasomatic carbonates, ore sedimentary deposits and phosphorite.
G.V. Ovchinnikova has more than 100 scientific publications.