I don't think Gilligan's Island was ever show in the UK or Europe, actually.
Are you sure Mairi ?
I seem to have a memory of it as a kid in the 60's it was a comedy ? don't no why i would remember the name if i had'nt seen it , will have to ask my mum .
We did get lots of American shows in the 60's , remember watching I love Lucy and Julie that was about a black nurse Diane Carole i think ?
Voyage to the Bottom of the Sea , Land of the Giants, Lost in Space and Star Trek i remember from that period .