I do not believe so. Haven't looked at signs in a while, but I believe I have only seen USD, CNY, JPY. And all change is given in Korean Won. You don't get back in currency you paid.
Instead, just use credit/debit card. There are NO ATMs in the gate areas past security. Zero. None. Nowhere. Don't expect them.
Too bad!Edited: 11 June 2018, 16:06
Oh. I guess pay in USD.Edited: 11 June 2018, 16:06