G-code is a programming language for numerical control.

G-code or G code may also refer to:

• Video recorder scheduling code, a video recorder programming system.
• Code of the streets, a code of conduct for those in the inner city.
• Tha G-Code, a 1999 album by rapper Juvenile.
• G-Code, a song by Geto Boys in their 2005 album The Foundation.
• G Code, a 2008 album by Korean rapper Eun Ji Won.
• a specific instance of the Bell 206B Jet Ranger III helicopter.
• certain codes used in non-uniform rational B-spline (NURBS) modeling.
• a code used in the U.S. medical billing industry with reference to the status of electronic prescribing, for Medicare reimbursement purposes.
• "G Code", a song by hip hop artist Kendrick Lamar present in his mixtape C4