GBK is a file format associated with Delphi programming environment. GBK files are typically found on Microsoft Windows systems. This type of file is supported by Delfy software developed by Embarcadero Technologies Inc.

GBK files store data used during code creation processes. Delphi is a an integrated development environment first released in 1995 and since then five versions of the software has been released. Delphi is popular among programmers who value fast and multiplatform solutions.