Out of interest, my cape gooseberry plants are grown outside, and still bearing fruit. I notice the patch on the allotment have been hit by the cold on the edges of the patch, but inside the patch the fruits are still ripening nicely, and I'm still picking them.
I have a couple in large pots in the back garden, which I moved close to the house recently - these have borne more fruit (despite no feeding) and show signs of finishing. I think I'll have a go at overwintering these in a tall cold frame on the allotment, nothing to lose!