No matter when you plan to apply for med school (apply summer 2018 intending to start 2019, or apply summer 2019 intending to start 2020), I would do something seemingly productive (eg classes, ECs, etc) to fill that time other than say playing videos games. I do not know how strong of an applicant you would be, but if for whatever reason, you failed in your attempt to gain an acceptance, you’ may have to explain that gap if you reapply.