$gmshfile

$gmshfile is the command to assign the gmsh file name. The fileformat in gmsh should be text format.The number "3" means the "GMSH mesh format". It shouldn't be changed since we use GMSH for most of case.

Example:

 $gmshfile
 meshfilename
  3

For example:

 $gmshfile
 Micro-LED.msh
  3