Will GTA Online progress carry over to GTA 6?
The direct answer
Unconfirmed. Rockstar hasn’t said whether GTA Online characters, money, or unlocks will transfer to GTA 6’s online mode.
GTA 6 launches with a single-player story; a new evolution of GTA Online is expected to follow rather than ship day one. Whether your current GTA Online progress carries over is one of the biggest open questions, and Rockstar hasn’t addressed it.
Historically Rockstar has not transferred progress across entirely new games, though it has moved players between console generations within the same GTA Online. Treat any "your money transfers" claim as unconfirmed.