I am 99,9% positive that new Gibson Acoustics, from 2013 on, come from the factory with Masterbuilt 80/20s. (I love them on my hummingbirds)
Just based on my personnal experience of trying brand new Gibsons in shops those last years : consistantly the same sound and feel and look, definitely factory Masterbuilt 80/20s.
On my own Gibsons I compared those factory strings with Daddario EJ11, 80/20s, 53-12s, : exact same strings, sound, feel, look, except the colored ball ends on Daddarios.
To me, as BBG said, Daddario makes EJ11s for Gibson.
Over here, when the Masterbuilts 80/20 12s are not out of stock, they're priced just a hair above the EJ11s, just paying for the Gibson packaging...