GameMaster commands allow a way that a script function can be invoked from the console window. The way to do this varies, depending on whether the function is in a server-side script, or client-side.
For server-side scripts, a GameMaster command can be created with the /REGISTER system, which links a specific GM command to a specific server script.
For client-side scripts, the appropriate function can be invoked with the CALL console command. For example, to call the
open() function in the client-side script
HE_ControlPanelGUI (which would open the HeroEngine control panel in HeroBlade), use:
call HE_ControlPanelGUI open
Note: The word "script" can be used as a synonym for "call".