What if? (just and idea of a Gravity Falls AU)

(Please excuse my grammar ;~; )

while I was taking a bath, something popped up in my mind.

What if there was an AU (alternate universe) of Gravity Falls where all the character's roles are swapped. Just like Reverse Falls but different. (idk if this AU exists)

example:

Dipper Pines-
smartass, always serious (maybe), wears a hat/ cap

Mabel Pines-
Happy-go-lucky, always joking around, wears sweaters

but let's swap their roles (if this AU doesn't exist, I'll call it Swap Falls)

Swap! Dipper Pines-
Always happy, jokes around most of the time, WEARS SWEATERS (mostly with a pinetree image/ print or so)
*basically the boy version of Mabel

Swap! Mabel Pines-
smart, discovered the journals, serious (maybe), wears a cap/ hat with a shooting star image/ print
*just like before, Swap! Mabel is the girl version of original dipper
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other ideas/ characters that are swapped with eachother's roles
Stanley & Stanford
Pacifica & Gideon
Candy & Grenda
Wendy & Robbie
Melody & Soos
Sheriff Blubs & Deputy Durland
etc.