I looked up Gaelic on
www.answers.com and the answers were rather lenthy but if you're really interested it's very neat. They give examples of pronounciation as well as history of the language and what Celtic / Gaelic includes.
Scottish Gaelic:
http://www.answers.com/topic/scottish-gaelic-languageIrish language:
http://www.answers.com/Irish%20languageCeltic Languages:
http://www.answers.com/Celtic%20languages
I hope this helps to explain it a bit better. Scottish Gaelic doesn't seem to be used that much any more where as Irish Gaelic is more commonly taught in schools and so forth. I don't know this for certain though! :)
Have yourself a buggy little Christmas! I've adopted 26 ! and 4 @, see my profile