I've searched the web, but couldn't find anything about the Unisys Graphical Interface. There is no website configured with information related to availability and compatibility with Windows versions.
If you have a source of this information, visit it to see exactly, otherwise launch the software in Compatibility.
Some apps are developed to run exclusively on one version of Windows and if it requires Windows 2003 Service Pack 1, then you actually need that or it won't work.