Every calculations program has its own input format and GiD is not prepared to know all these formats. The solution is one of:

• Output from GiD in one standard format and make external conversion to another one.
• Define or modify one GiD 'problemtype' to suit your needs. In this way, GiD will know what information should the user enter (boundary conditions, materials, ...), and GiD would write the calculations file in the exact format you need. We include several examples of problemtypes with the GiD installation, to help people to develop their owns.
• There are already interfaces with LS-DYNA3D, NASTRAN, Abaqus, and a basic one to SAP2000, ANSYS, Fluent and OpenFOAM. Contact CIMNE for further information.

The second solution is the recommended one. To do so, check the customization part in the help and check the 'problemtypes' given as a example.
To export only the mesh (not conditions, etc), it exist a standard directory /templates with some simple templates *.bas (see customization)to write the mesh in several formats: STL, VRML, NASTRAN, DXF. A user can add more user-defined templates to this directory.