There is no equivalent command for this GUI.

However, for example, for 2-Port topology where the gate setting of Trace 1 is being copied to Trace 2, the command is equivalent to:

:CALCulate:TRACe{1}:GATE:STARt?

:CALCulate:TRACe{2}:GATE:STARt

:CALCulate:TRACe{1}:GATE:STOP?

:CALCulate:TRACe{2}:GATE:STOP

:CALCulate:TRACe{1}:GATE:TYPE?

:CALCulate:TRACe{2}:GATE:TYPE