Urban craftsmen were not Gaboye at all. When those 19th century orientalist sources mention this they are focusing on rural bondsmen in Miiyiga who btw are descended from various clans , Gaboye is not a clan and their role is often reduced because food production take up the more importance, so they are secondary to that.
The urban ones were different they were organized into the formal professional guilds and were also from various lineages. They crafted things for market places and traded it.
And when other Somalis moved into the towns and cities they would often take up on the same occupations , the same with the rural Gaboye as they were no longer were bondsmen when they settled in the major towns and as it was more common place.