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 Film: Strong World, One Piece Wiki

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Monkey D. Luffy (Post-Timeskip), VS Battles Wiki

Why do people believe Gear 5 was planned since Chapter One when, gear of 5

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Was Gear 5 planned since Chapter One of One Piece?

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

GEAR 5 Has Been Foreshadowed Since Chapter 1

Gomu Gomu no Mi/Gear 5 Techniques, One Piece Wiki

Why do people believe Gear 5 was planned since Chapter One when, gear of 5

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