The development of GTK+ has been attributed to Peter Mattis becoming disenchanted with the Motif toolkit GIMP originally used; Motif was used up until GIMP 0.60.
GTK+的开发归结于彼得·马蒂斯对使用Motif开发的GIMP初版不再抱以期望；Motif的使用持续到GIMP 0.60。