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 transfer of authority from Britain to Sudan sparked an increase in nationalist sentiment, resulting in the expulsion of several members of the Jewish community in Khartoum. Gaon subsequently moved to Switzerland in 1957 and later acquired Swiss citizenship.