I haven't seen AG practice, but his 57 yard kick certainly wasn't bad. He had the pretty spin. loft, and direction that often eluded CF. He just needed to be kicking from 50 yards or less. His loft, i.e. ability to kick over the line, looks good; many kickers will kick with less loft for long kicks and get blocked.
That said, I believe I read here that AG was behind CF in terms of accuracy, i.e. many kicks were this pretty while others were off target. I would love to hear how things were going in practice later in the season.