The Garry's Squad Compound/Site Network (or GS/CN) is the organization and employers of g-Squad.
The GS/CN was established some indeterminate amount of time ago, presumably by bedrockperson. JOB INTERVIEW 10i-5 suggests that the GS/CN was formed by the amalgamation of several different agencies.

The GS/CN serves a variety of purposes. The organization deals in fields of military, science, and various other esoteric purposes, including the capturing and classification of certain anomalous entities.

The GS/CN, as its name suggests, operate through a number of compounds and sites. Compounds and Sites are designated by various Greek and Hebrew letters.