Type "The Gimp" (without inverted commas [edit - or with even]) in to the Google search engine. It will be the first thing on the list.
Click "Downloads"
Click "GIMP for Windows". It's on the left hand column.
Click "Automated Installer"
Click "Stable Version"
Click on "Download"
The download will then begin.
Fresh outta' the shop.
No real purpose with the whole showcase-thing, just liked the concept. If responses are good, I'll do some of the other tracks and configurations