When the British relinquished power in Sudan, subsequent increase in nationalism precipitated the exile of many members of the Jewish community in Khartoum. Gaon emigrated to Switzerland in 1957 and became a Swiss citizen six years later.
The relinquishment of power by the British in Sudan triggered a rise in nationalism, which in turn led to the forced departure of many members of the Jewish community in Khartoum. Gaon emigrated to Switzerland in 1957 and eventually became a Swiss citizen.