Read from the World of Warcraft client build files.
How Galactic Gladiator's Silk Robe Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Galactic Gladiator's Silk Robe suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Galactic Gladiator's Silk Robe is part of the transmog set Galactic Gladiator's Silk Armor (Priest 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 Silk Robe Fits
Other Items Named Galactic Gladiator's Silk Robe
1 other item in the current build is also called Galactic Gladiator's Silk Robe. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Galactic Gladiator's Silk Robe
Blizzard numbers items as they are created, so the named items next to ID 255376 (255371 to 255381) were usually added in the same batch as Galactic Gladiator's Silk Robe: the same quest line, zone, vendor or reward set.