So OV is at 757 goals in 1238 games. (0.61 goals per game).
Gretzky scored 894 in 1487* games (0.60 goals per game) during the high scoring 80s at that.
OV missed basically two full seasons not injury related.
2004/05 lockout would have been his rookie year. 2012/13 48 game season due to lockout. 2019/20, 2020/21 seasons cut short due to Covid. Doing the math, he'd be at about 850 goals by now if not for those missed games.
Baring injury or other factors, I think he'll break the record.
*1994/95 season was cut short to 48 games due to lockout.