GZ or gz may refer to:
Gary Grice (born August 22, 1966), better known by his stage names GZA ( JIZ-ə) and The Genius, is an American rapper and songwriter.
gzip is a file format and a software application used for file compression and decompression. The program was created by Jean-loup Gailly and Mark Adler as a free software replacement for the compress program used in early Unix systems, and intended for use by GNU (the "g" is from "GNU").
The Gzhelian is an age in the ICS geologic timescale or a stage in the stratigraphic column. It is the youngest stage of the Pennsylvanian, the youngest subsystem of the Carboniferous.
Granzyme A is a protein that in humans is encoded by the GZMA gene, and is one of the five granzymes encoded in the human genome .
The GZ convoys were a series of Caribbean convoys which ran during the Battle of the Atlantic in World War II.
Granzyme K is a protein that in humans is encoded by the GZMK gene.
Granzyme H is a protein that in humans is encoded by the GZMH gene.