GFS may refer to any of the following:
1. Short for Global File System, GFS was first developed at the University of Minnesota and now maintained by Red Hat. GFS is a File system that spans across a cluster and allows multiple computers to act as a unified machine.
Documentation for Global File System and Global File System 2 can be found at the following links.
2. Short for Google File System, GFS is the file system used by Google for its own use.