λgtk is a cross-platform Lisp interface to the complete GTK+2 family of shared libraries. λgtk currently runs in the following Lisp environments:LLGPL).
If you are familiar with Lisp function call syntax and the GTK API then programming with λgtk is straightforward. See examples.lisp for some demonstrations translated from the GTK tutorial.
The website is at https://common-lisp.net/project/lambda-gtk/
GTK binding, GUI