Usual: Common Core 6, 7, 8 in those grades

Moderately accelerated path:
Common Core 6
Common Core 7-8-"Algebra" in two years instead of three

More accelerated:
Common Core 6 in 5th grade
Common Core 7-8-"Algebra" in 6th and 7th grades (by placement test, not only for IDd gifted)

Still more accelerated (elementary option for gifted-identified only):
Common Core 4 and 5 in 4th grade
Common Core 6 in 5th grade
Option to do 7-8-Algebra in two years or in three

Subject acceleration within these sequences is also possible (not common).