These runtime libraries need to be downloaded and installed in order to run the main program, The Gimp. Install GTK+ Runtime Environment before installing The Gimp.
The GIMP (GNU Image Manipulation Program) is a freely distributed piece of software suitable for such tasks as photo retouching, image composition and image authoring. It is a powerful piece of software with capabilities not found in any other free software product. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, and an image format converter.