Find Phone number, Location Address and all other information of Colleges And Universities in Karachi Karachi Grammar School - KGS Karachi on Branches.pk, Pakistan’s Largest Branches Directory. You can contact them directly on Phone number +92-21-32252378, or you can visit their location in person, address location is: MIDDLE SECTION: 94, Depot Lines, Post Box No.7198, Saddar, Karachi..