Gerta (listed as Herta) appears in the 1939 census of Berlin at Chausseestrasse, 117, VH II. links under her married surname of Lesh. Siegfired Lesh is listed at the same address, and I assume this is Gerta's husband.

Also listed at the same address is Gerta's sister Erna and her family

Siegfried and Gerta were deported from Berlin to Auschwitz concentration camp on 06.03.1943.

One of two Yad Vashem records recording her deportation to Auschwitz concentration camp describes her as "murdered" (the other says "missing").