Ignition 8.0.16 Pass Windows system parameters to the Client application

Hello, dear Ignition community.
We have complicated network routing configuration. For the system to work correctly, we need to push Windows PC GATEWAY Ip address to the Ignition client application.
When editing launching parameters, there is Client Tag Override option, it seems good option for passing parameters. But the parameters are system variables. Can i put windows .bat script into the “value” field of override, or there is another way of pushing such values?

Maybe the Client Startup Script is better place to call Windows scripts out? Are there any examples, how to execute Windows bash terminal scripts and get result values back?

system.util.getGatewayAddress() did what we needed.