|Died||In 10–48 AC|
The World of Ice & Fire (mentioned)|
Fire & Blood (mentioned)
Gregor is remembered for being quick, strong, observant, and famed for his prowess with sword and shield. He was devoted to his king.
Gregor was chosen by Queen Visenya Targaryen, alongside his brother Ser Griffith, to be one of the first sworn brothers of the Kingsguard when the order was founded in 10 AC by King Aegon I Targaryen.