40/7/7 on 70 TS% Realistically I think he ends up somewhere between 19-22 PPG, 3-4 RPG, 3-4 APG 56-58 TS% Even if he only hit the low ends of those predictions it would be an improved, impressive 2nd season. Hitting the high ends of all those numbers would put him in pretty good company historically. Exceeding all of these high ends would be something only a small number of the best ever have managed and almost exclusively in their primes. Rarely their 2nd year.
It will be better for JG and team if he can average at least 20 points and 5 assists. Efficiency is the name of the game for him. There's a lot of scorers in the team. It will benefit him more if he can learn to pass and takeover whenever it is needed. This will conserve more of his energy for defense. He has the ability to score when needed and be the alpha of this team.