Personally, I love the Gimp, but I understand some people just can't handle that many windows. Here are a few tips.
1. Set the toolbar and docks to be above the image windows.
GIMP has a preference that will do just that. In the main GIMP window, click File->Preferences. In the preferences dialog, select Window Management from the list. Under the heading Window Manager Hints, change the two drop down boxes to Utility window.
You’ll need to restart GIMP to make the changes take effect. You’ll notice that the window decoration has changed on the toolboxes. They’ll now no longer appear in the window list, and will stay on top whenever an image window has focus.
2. Put the docks into the toolbar