Hogwart's School for Witchcraft and Wizardry
Gregory Goyle was a student in the same year as Harry Potter at Hogwarts who was sorted into Slytherin house. He was the son of Mr. Goyle, a Death Eater, and his wife.
Goyle, along with fellow Slytherin Vincent Crabbe, seems to have become best friends with Draco Malfoy before their first year at Hogwarts. Both wizards are shown to be more lackeys than friends, often following Malfoy around and doing his bidding. Goyle seemed to lack all intelligence, magical talent, and independent thought, and thus used only his size and strength to bully other students or scare off anyone who threatened Malfoy.
Gregory Goyle was born into a pure-blood arding family in 1980. His father, Mr. Goyle, was a Death Eater during the First Wizarding War and was a loyal supporter of Lord Voldemort until his downfall in 1981, in which he likely claimed to have only been acting under the influence of the Imperius Curse so that he would avoid certain fate in Azkaban. It is likely that Goyle knew Draco Malfoy and Vincent Crabbe before going to Hogwarts School of Witchcraft and Wizardry, probably because of their fathers as both Lucius Malfoy and Mr. Crabbe were Death Eaters as well.
At some point in 1991, before going to Hogwarts, Goyle purchased his wand, presumably from Ollivanders Wand Shop in Diagon Alley, London.
Goyle started his education at Hogwarts School of Witchcraft and Wizardry in 1991, with his family being from a Death Eater background and being pure-bloods, he was quick to become a friend and sidekick to Draco Malfoy, the son of a wealthy Death Eater Lucius Malfoy. Goyle was already friends with Draco on the Hogwarts Express train journey and, along with Vincent Crabbe, the three met Harry Potter and offered him acceptance into their clan. However, Harry rejected this offer and left Draco Malfoy, the leader of the group, confused as to why he’d pick Ron Weasley to be friends with over himself. After being rejected, Goyle attempted to steal some of Harry and Ron’s treats from the food trolley and he ended up getting bitten by Ron’s pet rat, Scabbers. When he arrived at Hogwarts, he was Sorted into the House of Slytherin with his friends Draco Malfoy and Vincent Crabbe.