Was over just to the east of that doing the Mam Tor circuit on Sunday and conditions were perfect – totally frozen. I think it has warmed up this week, but not massively so (it frosted last night in S Manc for example), plus it’s not rained either. So I reckon it’s game on for your route.
As mintimperial mentions there was no evidence of Chapel Gate being closed last time I was up (also 2 weeks back I think). Maybe someone has taken some signs down but it’s not like it was being worked on or anything, passed loads of walkers and some motorcyclists using it. So that’s prob an (unpleasant) option if it’s likely that Rushup will be heavy going.