I've had it. You can usually get it in the US in the "Ethnic Food" aisles at reasonably-sized grocery stores.

Aside from being orange, I don't have recollections of a very gingery flavor tho...

Normal Irn Bru is just made from sugar and rust (OK, ammonium ferric citrate if you're being picky) so it doesn't taste like ginger.

I do recall there being a "spicy" variant a few years ago that did taste a bit like ginger but, as I can't stand Irn Bru at the best of times, I don't recall the details.

Source: married to a Scot that basically lives off the stuff. Bit surprised she isn't magnetic.