Digging around the web for AGS math in Oregon, it looks like it is basically integrated math, covering algebra 1 and 2 and geometry, plus some statistics. Presumably, any trigonometry would be at the very basic introductory level.
Since AGS 1 through 3 are considered high school level, a student in AGS 2 in 8th grade is two grades ahead, although it may seem only one grade ahead in high pressure schools where the norm is one grade ahead.