From the GoRC.htm manual:

Copyright

GoRC is Copyright © Jeremy Gordon 1997-2013 [MrDuck Software] - all rights
reserved.

GoRC - licence and distribution

You may use GoRC for any purpose including making commercial programs. You
may redistribute it freely (but not for payment nor for use with a program
or any material for which the user is asked to pay). You are not entitled to
hide or deny my copyright.

Disclaimer

I have made every effort to ensure that GoRC's output is accurate, but you
do use it entirely at your own risk. I cannot accept any liability for it
failing to work properly or giving the wrong output nor for any errors in
this manual.