Getting to know 5th Edition
An ancient kingdom that used to take up most of the coastline of Stoneshore, it used to be merely small settlements of southern Human slaves that escaped from the Sumaan Empire and sheltered in the tracks of land not taken up by the kingdom of Soris. These settlements grew in size until finally they declared themselves their own kingdom and swore themselves constant allies with Soris against the southern empire. However, rather than embrace Soris's theocratic form of rule, their king would pass his crown to someone of his line, much like the southern empire.
During the Earthbreaker War, as the Sumaan Empire began getting the upper hand and the Elfves of Quendayar marched against their former allies, the nobility of Gauld turned to dark sources for the strength they needed to overcome their allies. Summoning fiends, they made dark pacts which allowed them to devastate their opponents, but which also began to corrupt the minds of their leaders until those leaders also began attacking their allies as well, convinced that betrayal was immanent. This paranoia also began turning Gauld leaders against each other until they unleashed their power against themselves, shattering their own lands and wiping out most of their people.
Now, little is left of the former kingdom aside from ruins, tieflings and a cautionary tale told by the fireside.