yes, it is grdgenxo, a lot of process parameter must be included in the itf file
when running, a lot of file will be generated, those file are in a directory whose name is defined in the itf file, those file is of no use for you, they are only internal calculation file.
the run time is very long, at least, it will cost several hours, it depends on your computer, after the calculation be finished, a grd file will be generated in the current directory, the file name is the same with the directory, that is, it is defined in your itf file,
hope this helps