Read from the World of Warcraft client build files.
How Galactic Gladiator's Silk Raiment Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Galactic Gladiator's Silk Raiment suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Similar Items
The 5 items nearest to Galactic Gladiator's Silk Raiment (item level 197) in item level among Armor > Cloth, Chest slot, from item level 165 to 197.
Galactic Gladiator's Silk Raiment is part of the transmog set Galactic Gladiator's Silk Armor (Warlock only), which the Appearances collection lists in 3 versions. The other 16 pieces:
Items Numbered Next to Galactic Gladiator's Silk Raiment
Blizzard numbers items as they are created, so the named items next to ID 255395 (255390 to 255400) were usually added in the same batch as Galactic Gladiator's Silk Raiment: the same quest line, zone, vendor or reward set.