This is the HQ version of the drawing that features as GIMP splash for 2.7.2 and 2.7.3 development versions. Yes I drew it.
Here's the origin story: People who have seen the movie "Pulp Fiction" come by GIMP mailing lists and IRC channels on a regular basis to complain about the way their dirty mind works when somebody talks about GIMP, thus reminding us of the BDSM reference originating from that movie. And then cage tool got merged. Cage, BDSM, gegl getting more control in the inner workings of gimp... Thus the image came to be. Outrage over the use as a splash has been hilarious It's development build, people. Your grandma shouldn't be using it. Neither should you, unless you wish to contribute to development.