From A Wiki of Ice and Fire
|Allegiance|| House Goode|
|Book(s)||The World of Ice & Fire (mentioned)|
Ser Gregor Goode was a knight from House Goode, and brother to Ser Griffith Goode. They were chosen by Queen Visenya Targaryen to be one of the first knights of the Kingsguard when the order was founded in 10 AC by King Aegon I Targaryen.