Gekko includes user documentation, so after installation of Gekko, you may press F1 or type HELP to open up the Gekko help system.

Alternatively, below you can find two versions of the help system. The first is a web version, whereas the second is a downloadable help file (same as the one you get when installing Gekko):

• User documentation (web version, Gekko 2.0 (2.0.2))
  
• User documentation (single .chm file, Gekko 2.0 (2.0.2)). If this file does not open up properly, please see here.
  

Older versions of the user documentation:

• 1.8: web, chm.
  
• 1.6: web, chm.