How stop the Gcode (@pause like) from firmware? (no replies)

Hi,
How can I stop the Gcode reading from firmware command but maintein the printer connected (temperature reading etc..) exacly as a @Pause command?
I already try

GCode::executeFString(PSTR("@pause"));

but not work.......
It's possible tell at Repetier to start/stop to send gcode ?

in my particular case I'm receiving the Gcode with these functions in loop, but how can stop still receiving the temperaturature command from Repetier?
--loop-------------------
GCode::readFromSerial();
GCode *gcode = GCode::peekCurrentCommand();
gcode->popCurrentCommand();
-------------------------

Thank you!