Gretna FC very clearly ceased to be, to the extent that the new club is officially called Gretna FC 2008 to avoid any confusion.
https://en.wikipedia.org/wiki/Gretna_F.C._2008
Also, from your list, Wimbledon doesn't exist any more either - AFC Wimbledon are a different club.
https://en.wikipedia.org/wiki/AFC_Wimbledon
The there's Airdrieonians, who are not a continuation of the old, dead, Airdrieonians, but who started life as Airdrie Utd.
https://en.wikipedia.org/wiki/Airdrieonians_F.C.
You really dinnae do yerself any favours min.