This is a port of Qt Import Export Sample to GTK+ gui. It is an attempt to give a basic framework of OpenCASCADE application with the GTK+ GUI. Though it neither has a multiple document interface (MDI) nor does it have a document/view architecture as in the Qt Sample application provided in OCC SAmples, it is a good starting point for those who need to develop Open Cascade applications with GTK+ as the GUI. Though the application is developed by me, Peter Dolbey of the Open Cascade Community is accredited with the hosting of the source code on his website. Hope this will be useful code fragment for the Open Cascade Community.