Looks like a typo to me for "ge bith"
Am Měcheal Eile
> This time it's "ge brith".
> "Ann an da-ri\ribh, ge-ta\, ge brith de\ na
> h-atharrachaidhean a tha\nig
> air an t-saoghal pholitigeach, mhair cumhachd agus neart
> Eilean Idhe mar
> a bha."
> A meaning of "whatever" can be deduced from context, but the root
> meaning of "brith" is not so clear. Is it a variation of
> "bri\gh", or is
> it related to "britheamh"? Either one would make sense.