He was targeted in the red zone with Garoppolo under center in the 4th with the game far out of reach. There's no way Gronk is in that game if he isn't near 100%. Did some of you not catch his TD catch and run where he barreled through three defenders in true Gronk fashion? He's fine, Brady is just ####### brutal right now.
As for snap count vs. snap percentage, I believe they prepare to get Gronk involved in a very specific way each week in practice as they look to increase his offensive involvement. If the total plays aren't there, the actual snaps won't be either. Percentage is the key indicator here, it always has been.
Are you talking about his knee, or overall? There's no way he's near 100% overall.
I agree that they prepare to get him involved in a specific way, and if those opportunities do not present themselves as much as planned, that will limit his snaps. However, if he was 100% as you say, they wouldn't be limiting his snaps in the first place.
Percentage plays a part, but so does the total. I would prefer to see him playing 45 out of 70 snaps than 30 out of 45 even though it's a lower percentage, and I would prefer to see his snaps played increase each week instead of just the percentage.