I was always led to believe that over-wintering Geraniums was difficult, well this obviously isn't the case. If I can do it; anyone can!
I only have these two pots of Geraniums, but they've now survived for about 5 years.
In early winter (before the frosts) I bring them indoors, and cut them back to as close to the roots as possible, whilst preserving a few of the leaves.
Their watering is kept to a minimum, and frankly I just ignore them for the few months they're indoors.
And voila; I have green fingers after all. Don't they look great?