Gerd Grieg made her acting début at the Nationaltheatret in 1910. In 1913 she appeared in several short silent films made by Danish film director, August Blom (1869–1947). In 1917, she began her five years in Berlin to record films for the film company of her sister Aud Egede-Nissen. She returned to Norway in 1922 and to the Nationaltheatret in 1928.[3][5]
She was married to surgeon Ragnvald Ingebrigtsen (1882–1975) from 1922 to 1940; they had three daughters. Ingebrigtsen later married Gerd's younger sister Gøril in 1962.
She remarried in 1940 to poet, novelist, dramatist and journalist Nordahl Grieg. Nordahl Grieg served in World War II as a war correspondent and was killed while on a bombing mission to Berlin during 1943.