Read from the World of Warcraft client build files.
How Grievous Gladiator's Silk Robe Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Grievous Gladiator's Silk Robe suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Grievous Gladiator's Silk Robe is part of the transmog set Grievous Gladiator's Silk Armor (Mage only). The other 15 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Grievous Gladiator's Silk Robe Fits
Other Items Named Grievous Gladiator's Silk Robe
4 other items in the current build are also called Grievous 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 Grievous Gladiator's Silk Robe
Blizzard numbers items as they are created, so the named items next to ID 100661 (100656 to 100666) were usually added in the same batch as Grievous Gladiator's Silk Robe: the same quest line, zone, vendor or reward set.