gw/stat is a SAP Parameter attribute which is used to control Statistic switch information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter determines the status of the gateway statistics after
the start of the gateway. The gateway statistics can be evaluated
and dynamically changed using the gateway monitor.
Value
0: Statistics inactive
1: Statistics active
See SAP Parameter Documentation for full SAP documentation for this profile parameter.