As far as I am aware, the original Station gates now reside at the entrance to Cosford airfield.
Purely as an aside, the sports pavilion was there in the 60's as I changed in it as a space cadet, again in the 70's playing cricket for Valley and was still standing (just!) last time I looked in 2007. A miracle of construction.
As of today there is a pair of gates on the East Camp on a skip behind the NAAFI. At Sealand there were three camps and many entrances so perhaps the ones at Cosford are one of these others but seem not to be the main gates.
We could not manage to cover the whole of two camps and the sports field but the pavilion is still standing and is vandal-proofed, not a pretty girl but durable.
The East Camp is pretty well complete but the South Camp is struggling.