I am kind of disappointed at the encrouchment of politics into Amateur Radio - isn’t that the one thing that hsould be removed from radio!?
I am neither going to give my comment on where Ulster is/what country Donegal is part of. It’s up there, as I point upwards
The operation of in-car GPS devices in the republic of Ireland, downhere, are, as far as I am aware, completely legal.
What is not legal is the operation of cellular mobile telephones - those devices that provide two-way communications via a cellular network.
As far as I am aware, the use of two-way amateur radio equipment is legal in moving vehicles. I have been stopped at Garda (police) check-points, and have never been asked questions about the radio in my car/operation of it etc.
As to which area of the island of Ireland to visit, that depends on what you are looking for.
The northern section of the island (Donegal/Sligo/over to the north-east area) is very beautiful, lots of nice people, summits, and plenty of nice pubs.
Basing the answer on number of summits, you’d see:
* IN - Ireland North (97 summits)
* IS - Ireland South (131 summits)
* IE - Ireland East (72 summits)
* IW - Ireland West (87 summits)
If you are looking for some information on the south/south-east or east, you can let me know, as they are the two areas I know best.