Hello, and welcome to GCBASIC help. This help file is intended to provide you insights and knowledge to use GCBASIC.
For information on installing GCBASIC and several other programs that may be helpful, please see Getting Started with GCBASIC
http://gcbasic.sourceforge.net/starting.html
If you are new to programming, you should try the GCBASIC demonstration programs these explains everything in a step-by-step manner, and assumes no prior knowledge.
If you have programmed in another language, then the demonstration files on GitHub ( or within your installation ) and this command reference may be the best place to start.
If there is anything else that you need help on, please visit the GCBASIC forum
http://sourceforge.net/forum/?group_id=169286