If you started the CICS Transaction Gateway from the command line, and you did not specify the -noinput parameter, you can stop the Gateway by typing the correct character and pressing the Enter key in the Gateway console session.
If you did not start the CICS® Transaction Gateway with the -noinput option, messages describing which keys to use for shutdown are displayed at the end of startup. If you used the -noinput option, you must kill the process to stop the CICS Transaction Gateway.
If you used JCL to start the CICS Transaction Gateway, use one of the supported MVS™ system commands to shut down the Gateway. See Gateway daemon administration for details.
If you have problems stopping the Gateway daemon, see Gateway daemon fails to shut down.