Resolves yes ifResolves yes if a chapter numbered 1204 or lower explicitly shows or states how Brook and Gunko know each other, through a flashback or dialogue explaining their shared past. Hints, looks or a one-line recognition resolve no.
SourceMangaPlus (official)
TriggerOne Piece chapters up to 1204 on MangaPlus
Closes24d left (arc market)
Decided byModerators, against the source above