If you mean the UK style hinged gates then you could look at using either the Tortoise, Fulgurex or Lemaco slow action point motors. You will have to make up your own linkages though. Another possibility would be to use R/C servo's.
If you want the barrier type then Viessmann & Busch do some very nice prototypical action ones than can be easily "anglised".
Hope this helps.
If you want the barrier type then Viessmann & Busch do some very nice prototypical action ones than can be easily "anglised".
Hope this helps.