What does GKS stand for?

Gesamtverzeichnis der Kongressschriften - Union List of Conference Proceedings - Deutsches Bibliotheksinstitut - Germany - Information service or system (CRD)

Glas-Sport Manufacturing Inc., Watertown, SD - Manufacturer code for watercraft hull identification number (USCG)

Grand Keeper of the Seals - Freemasonry

Graphical Kernel Standard (SAUS)

Graphical Kernel System - International Standards Organization - Computer science

Graphics Kernal System (GIS)

Graphics Kernel System (SAUS)

Greeks - Telegraphy (PCTE)