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?

One Piece Spoilers: Does Luffy Beat Kaido With Gear 5?

One Piece's Creator Confirms Gear 5's Hidden Origins

One Piece anime drops first look at Gear 5 “Joyboy” Luffy - Dexerto

OP-05 manga card! : r/OnePieceTCG

One Piece: Luffy's Gear 5 Technique (Explained)

One Piece's Creator Confirms Gear 5's Hidden Origins

Luffy has a design problem (1046) : r/OnePiece

One Piece: Will there be a Gear 6? - Dexerto

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

The parts of the story Oda planned since the beginning [1044 Spoiler] : r/ OnePiece