New IFC File Format Import and Export GstarCAD 2020 supports .IFC file format import and export. IFC (Industry Foundation Classes) is a standard format used in building and construction industry that provides interoperability between different software applications. Since IFC format supported in GstarCAD 2020, you can import and export standard IFC file format, as well as view 3D models by category and operate in GstarCAD conveniently.