Incorrect about the North Wexford line: Macmine Junction, Chapel, Rathgarogue, New Ross and Glenmore all received GSR bi-lingual signs.
I'm not sure about the Bagnalstown-Palace East line but Palace did only have DSER english only signs.
From my knowledge, most of the stations on the South Wexford line including Waterford retained their GSWR english only signs till updated with the white signs. Not Sure about Rosslare Strand, Harbour or Pier.
Kilrane retained its GSWR english only sign till closure.
Woodenbridge Junction possibly had english only till closure.
Tara Street and George's Quay was english only till updated till the white signs.
Arklow kept its DSER english only sign above the station exit well into the 80s (albeit painted black letters on white board)
Greystones and Delgany had a GSR bi-lingual sign also well into the 80s
Other stations to definitely receive GSR bi-lingual signs: Edermine Ferry, Enniscorthy, Ferns, Inch(Possibly, my memory is a blur), Avoca, Rathdrum, Rathnew, Wicklow, Greystones and Delgany, Bray. All stations on the Harcourt Line. Killiney and Ballybrack, Dalkey, Sandycove and Glasthule, Dun Laoghaire, Blackrock, Liffey Junction.
Not sure about terminal stations such as Harcourt Street, Amiens Street, Kingsbridge and Westland Row but Amiens Street did gave a GSR bi-lingual sign on the signal cabin.