what a/c type
Boeing 737s. Series -300, -400 and - 500. I believe they are still using one Airbus A319 down there for some routes and the number of these at Gatwick is set to increase.
could you commute
Yeah. A nice chap on EF LGW lives in and commutes from Amsterdam. Says it works out just fine.
is it night stops all the time
For the most part, yes. There are a few night stops available but these are mainly the domestics. I do understand there to be a small number of Euro overnighters available though.
if not lgw are they taking on at lhr
Not any more, AFAIK. Even internal recruitment is now limited to Euro Gatwick.