You probably won't get a score on the Plat paperwork. Credit providers are required to give you a score when you're denied or when they approve you but not at the best terms. The Platinum is binary - you're either approved or you're not - so you can't be approved but get worse terms.
I went back and double-checked my Gold paperwork. No score.
AMEX Platinum NPSL | AMEX Zync NPSL | AMEX Delta Platinum $4000 | Travelocity Amex $4000 | CapOne No Hassle Rewards $2500 | BBRZ MC $800 | Local CU Visa $1000 | Kay $2000 | Citi Hilton HHonors Reserve $5000 | Chase Marriott Rewards $5000 | BankAmericard Travel Rewards Visa $7000 | Discover IT $1000 In the garden until 10/2014