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.