To start the CICS Transaction Gateway with the default options, type ctgstart at the command line and press Enter.
A Gateway console session starts, and messages are displayed showing the values being used. To override the startup defaults, type: ctgstart at the command line, followed by the startup options you require, and press Enter. A Gateway console session starts, and messages are displayed showing the values being used.
To get help for the startup options, enter: ctgstart -?