We don't have any information on this one outside of the picture appearing on 4chan, but it's looking like the Girl Scouts might be teaming up with G5 for a crossover pony named Scout Kind Heart! She's pretty cute isn't she?
I'll pop up some updates if we get more details. For now, go make fanart of her.
Update: Apparently she's listed over on this Shopee website based out of Vietnam. Most likely being sold on the side before officially released as we sometimes see out of countries over there.