Overwintering geraniums

I do - there are 3 hanging baskets that have been outside for 2-3 years - mainly because I forget about them  There are begonias in there too.

I also have a few in planters that, when I remember I move into the GH and stash under the bench. Cut out dead  stems, cut down the new stems and wait for them to regrown in spring. Don't water or they'll rot in the cold.