gw/export_trace_level is a SAP Parameter attribute which is used to control Export trace level to external clients, gateways, ... 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 .
Defines whether the trace level should be passed on to external clients
and gateways.
The following values are permitted:
0 : Trace level is not passed on
1 : Trace level is passed on
See SAP Parameter Documentation for full SAP documentation for this profile parameter.