A moratorium is in effect on adding information from Fire and Blood until December 20th.
Glory is one of Ser Jaime Lannister's horses. Jaime dresses Glory in the colors of the House Lannister and Honor in the colors of the Kingsguard.
Glory is named by Lewys Piper, one of Ser Jaime Lannister's squires. Jaime takes Glory with him to end the siege of Riverrun.