-gsx:
The Ghostscript used when dviout interprets PostScript has the file name of gswin32.exe. The default is the file in the directory in the path. However, the start-up command for this program with the path can be specified explicitly by -gsx: (Property Sheets->[Graphic]).
If the long path name has a space character, use the short path name. The path name obtained by pushing [gsx:] button is the short one.
Parameters of Ghostscript can be spcified also. for this, replace the spaces with ^ as the delimiters when specifying. For example,
-gsx:c:\gstools\gs4.03\gswin32c.exe^-dNOKANJI