[1] She met her future husband, Jim Rose, during amateur dramatics at Bletchley Park when they both worked there during the Second World War.
She played one of the lead roles in Synge's The Playboy of the Western World opposite Cyril Cusack at the Mercury Theatre, London.
When the Second World War started, she joined the Entertainments National Service Association and was in productions in Bournemouth and Birmingham and by 1942 was about to take a leading role at the Aldwych theatre.
[1] At this point, because of her language skills and family background, she was invited to an interview with Frank Birch, an ex-actor who was in charge of Hut 4 in the Naval section at Bletchley Park.
Her knowledge of German led to her being employed in the section that entered keywords from decrypted messages onto index cards so that the information could be searched as effectively as possible.
Gibson rose to be in charge of all the Naval Sections records and thus one of the most senior women at Bletchley Park.
Instead she taught at a local comprehensive school that supported newly arrived Caribbean children from the Windrush generation.