If when you say geraniums you mean bedding geraniums which are now called palargoniums then yes they will need frost protection. Potting them up will be fine keep them frost free and im a sunny spot until late next spring when they can go back outside. They do get a bit leggy indoors so I'd suggest you give them a hard prune when they do. The leaves will return in 2-3 weeks.

Hi Anchorman

Thanks so much will do as suggested, still have loads of flowers so hoping for no frost yet