The only barbs I've ever kept were Denison barbs. When my Gold Severums were fairly small (<4 inches) I kept them in a 75g tank with mature Denison barbs with no issues. The Severums were only in the tank to grow a bit before I added them to my South American cichlid tank, but they didn't seem interested in the barbs. Even now, in the S Amer tank, the mature Severums mostly seem only interested in each other, though they will hold their own if bothered by other fish.
I know nothing of Gold Barbs, but if they're large enough to not be seen as food, or if the Severums are juvenile and the barbs not aggressive, it could work. It's always a good idea to have a back-up tank available if things don't work out between species, however.