The WinGX program has its antecedents in the GX program system, written by Paul Mallinson & Ken Muir of the Department of Chemistry, University of Glasgow. This was a text driven interactive set of programs which handled most aspects of crystal structure determination and for the time was quite revolutionary.

Although relatively little of the GX FORTRAN code now remains in WinGX, it formed the basis for the original version of WinGX in 1997.

The GX source code and documentation may be downloaded here.