|Allegiance|| House Gaunt|
|Died||In 277 AC, at Duskendale|
|Book(s)|| The World of Ice & Fire (mentioned)|
A Storm of Swords (mentioned)
A Feast for Crows (mentioned)
In 277 AC, when King Aerys II Targaryen accepted the invitation of Lord Denys Darklyn and traveled to Duskendale, Ser Gwayne accompanied him as part of the king's small escort. Upon arrival, however, the king was taken captive, and Ser Gwayne was slain by Ser Symon Hollard, the master-at-arms to Lord Denys, in an attempt to defend his king. His death was later avenged by his sworn brother, Ser Barristan Selmy.