Read from the World of Warcraft client build files.
How Galactic Gladiator's Cloak Compares
Who It Suits
Galactic Gladiator's Cloak carries Agility or Strength or Intellect, the primary stat of Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Beast Mastery, Marksmanship and Survival Hunter; Assassination, Outlaw and Subtlety Rogue; Discipline, Holy and Shadow Priest; Blood, Frost and Unholy Death Knight; Elemental, Enhancement and Restoration Shaman; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Galactic Gladiator's Cloak is part of the transmog set Galactic Gladiator's Silk Armor (Mage only), which the Appearances collection lists in 3 versions. The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Galactic Gladiator's Cloak Fits
Other Items Named Galactic Gladiator's Cloak
8 other items in the current build are also called Galactic Gladiator's Cloak. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 255373 (255368 to 255378) were usually added in the same batch as Galactic Gladiator's Cloak: the same quest line, zone, vendor or reward set.