CGZ is the extension given to files associated with one of the Linux operating system distributions called Red Hat. CGZ files are files that are used to store archives containing drivers for various computer components. Such files are usually attached to the distribution (installation) version of the system. Drivers ensure correct cooperation of the operating system with the various types of hardware.

Linux is a free and open source operating system. Red Hat is a distribution that comes in a version for single workstations as well as a server version.