TL;DR - Me and 2 of my friends all got GG MF today off the loot system (my friends off a lion orb and me off a Hextech Chest and Key). Someone we all got GG MF. What makes it weirder, it didn't give me a skin shard - it just permanently unlocked the skin for me.
This happen to anyone else?
Ironically enough, after being incredibly vocal on the NA forums about how the skin wasn't worth Ultimate-tier skin cost, I got it for free.