Gabriel is an expositional teacher of the word of God, a teacher of mathematics, and a profound researcher. Modeling and Simulation remain his research interest with particular emphasis on vehicular traffic flow theory, and applications to some differential systems.

He holds a PhD and an MPhil degree in Applied Mathematics from the Kwame Nkrumah University of Science and Technology, a B.A. in Economics and Mathematics from the University of Cape Coast, a Diploma in Education from the Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, and a Certificate in New Testament Studies from the Calvary Bible Training Center.

Dr. Fosu has served as head in some distinct offices and again served as a member on several boards and committees. He has supervised many undergraduate and postgraduate thesis. He also provides assistance to some refereed mathematics journals as a peer-reviewer.

Adding to his faith, virtue, knowledge, temperance, patience, godliness, and love to impacting himself and the world around him has been his pilgrimage pursuit.