The documentation is a work in progress. Not all functions have associated help files and not all functionality is covered by the demos. The help files currently cover about 50% of the functions and the demos mainly cover the use of FEBio.
Follow the installation instructions to integrate and access GIBBON documentation from within MATLAB. The name for all function help files (the files that generate the help/documentation when published with MATLAB) starts with
HELP_, all demo files start with
DEMO_. This way users may explore/open/edit these files by typing
open HELP_functionName or
open DEMO_functionName in the MATLAB command window