It is possible to open an IDLE shell, e.g. to try interactive Python commands, with the Tcl proc GiD_Python_Open_IDLE_Shell
In practice go to GiD menu Utilities->Tools->Console Python…
e.g. the next picture show this IDLE console and the use of a Python command to set a variable with the current number of surfaces asked to GiD
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Note that the new line is not immediately shown, until the model is redrawn (can invoke it with with tcl.GiD_Redraw())
Note: The use of this console is recommended to interactively try several Python commands.