The dataR.cpk file found in Persona 5 Royal contains a GMD model folder, Model (P5R). Each folder is categorized by character ID number. See Model (P5R) for a full list of ID number with character names and descriptions. 4054 refers to P5R's Eiko, and contains 3 GMD models related to her.
|1||c4054_001_00.GMD||Summer Shujin||Shujin uniform worn in summer|
|2||c4054_002_00.GMD||Winter Shujin||Shujin uniform worn in winter|
|3||c4054_003_00.GMD||Summer Casual||Casual outfit worn during summer|