GiD - The personal pre and post processor
TCL AND TK EXTENSION
This chapter explores GiD's advanced features for expandability and control. Using the Tcl/Tk extension, you can create script files to automate any process in GiD. This language allows adding new windows and functionalities to the program.
For more information about the Tcl/Tk programming language itself, look at https://www.tcl.tk/
If you are going to use a Tcl file, it must be located in the Problem Type directory and be called problem_type_name.tcl.