Key: Last Name, First Name - Book first appears in. Short summary.
Goyle - Book 4. Goyle's father, a Death Eater.
Goyle, Gregory - Book 1. One of Malfoy's large Slytherin bodyguards.
Granger, Hermione - Book 1. One of Harry's best friends. Also the top of the class. She gets flack from many Slytherins for being a Muggle-born witch.
Granger, Mr. and Mrs. - Book 2. Hermione's Muggle parents.
Griphook - Book 1. A Gringotts goblin.
Grubbly-Plank, Professor - Book 4. Witch who subbed for Hagrid.
Gryffindor, Godric - Book 2. One of the Founders of Hogwarts. Owner of the Sorting Hat.
Gudgeon, Davie - Book 3. Boy who almost got an eye poked out by the Whomping Willow.