Was Gear 5 planned since Chapter One of One Piece?

Oda is a master of foreshadowing. But was Gear 5 planned since Chapter One of One Piece? Or a random power-up as some fans believe?

Was Gear 5 planned since Chapter One of One Piece?

One Piece Chapter 1095: Luffy's Gear 5 vs Saturn continues; Everything we know so far

One Piece Chapter 1069: The Straw Hats learned the truth about Luffy's Gear 5

Will Luffy learn Gear 5 against Kaido? - Quora

Why do people believe Gear 5 was planned since Chapter One when this is obviously not the case? : r/Piratefolk

Was Gear 5 planned since Chapter One of One Piece?

One Piece Teases The Big Twist Behind Luffy's Devil Fruit (& Gear 5)

One Piece Anime already has a release date for Luffy's Gear 5 episode - Meristation

One Piece Confirms Luffy Has Already Moved Past Gear Fifth

Was Gear 5 planned since Chapter One of One Piece?