Haha, I do actually! Fond memories of playing that with my brothers.
Depends on who you ask, really. Gaelic is indisputably a language completely separate from English, but I'd personally only consider Scots to be a dialect of English myself. And if you do choose to consider it a language, then you'd probably also have to consider the dialect spoken in the Shetland Islands to be a separate language too given that it's just is distinct and different to Scots (thanks to heavy Scandinavian influences) as Scots is itself to English. So depending on your definitions of language, there are anything from two to four languages here. There's also the language spoken on the Island of Man (Manx), but it's debatable whether that's actually a part of Scotland or the UK in general.
Scottish Gaelic is very similar to Irish Gaelic according to a friend who speaks both, so I'd imagine that the difficulties involved are pretty much the same. And yeah, I'm finding it tough.

It's not particularly phonetic at all, the word roots are generally alien when compared to other European languages, and its use of verb-subject-object grammar (which is rare and only really shared by Hawaiian, Tagalog and its fellow Celtic languages to the best of my knowledge) means that I can't really rely upon my knowledge of other grammar systems in any way. There's also the issue of there just not being very many resources out there to learn it. Most of the languages I've tried until now have been at least semi-popular and spoken by a very large group of people, but Scots Gaelic is an extreme minority language and one that has also been damaged by years of oppression and regulation. There aren't that many native speakers of the language out there, it's only been recently that art has begun to reemerge in the language, and even the textbooks can be very basic and not particularly useful. Obviously things are getting better over the last twenty or thirty years with the Scottish government putting a lot of energy and money into it, but it's still nowhere near as easy to get into as something like French, German or even Japanese. Think I'm going to have a lot more trouble with it than many other languages that are culturally and geographically more "foreign". :'D