[3] Gustav took an appointment as Secretary to the akuapim native authority in 1944 before deciding in 1949 to pursue further education oversees to study for his LL.B and make law his professional career.
In 1956 after a successful completion of his LL.B and an acquisition of a diploma in International and Comparative Air Law, and a call to the English Bar, he returned to Ghana to embark on private practice.
In 1968, he received a grant for a fellowship under a British Technical Assistance Programme from the Ministry of Overseas development to research into Customary Arbitration at the School of Oriental and African Studies, London.
[3][5] Amidst mounting nonviolent opposition of the SMC government run by Ignatius Kutu Acheampong, discussions of the country's political future had begun.
Dr. Gustav Koranteng-Addow had toured the length and breadth of the country to collate views from the people on the Union government idea proposed by Acheampong.
Following the overthrow of Ignatius Kutu Acheampong by fellow SMC member Fred Akuffo, Dr. Gustav Koranteng-Addow was relieved of his duty as Attorney General of Ghana following his criticisms of the ruling Supreme Military Council's plan to return the country to party politics that year.