[1] For many years she was the primary photographer of works by the German-born artist Mathias Goeritz, her husband from 1942 to 1958.
[6] In 1942 she met the German-born painter and sculptor Mathias Goeritz in Tangier, when both were working at the Deutsche Akademie.
[7][5] They married the same year,[7] and settled in Spain after the Second World War, living first in Granada, then Madrid.
[8][9] In 1948, the couple moved to Santillana del Mar because Gast had been commissioned to take photographs for a planned book on the town.
[11] In 1951, Gast became the head of the new José Maria Zepeda Estrada gallery in Guadalajara.