Irish. Not Gaelic.
So where did ‘Gaelic’ come from, you ask? ‘Gaelic’ is the Anglicized version of Irish’s name in Irish: Gaeilge. So when someone says “I got this cool bracelet with a poem written in Gaelic on it!!!!!!1” they are doing the equivalent of saying “I speak Español” or “I can read Ruskiy.”
Image source: http://www.lochariach.com/sites/default/files/styles/gallery_colorbox/public/page_images/irish_background2.png?itok=KDm7sGfV