Sorry for the late reply. millersb02 has elaborated on many things I would've said. However, to add on -
The school may agree with the need to identify the gifted and give support, but if their resources are so few, they may not have the capability to.
Enrichment is all well and good, but if school itself is mostly too simple, that's a lot of wasted time that could've been used to learn new things.
Perhaps you could look at the reasons the boys are underachieving at school? Simple boredom? Lack of organization?
If there isn't much the school can do, I would personally advocate for grade skipping. Saves time down the road, and gives them more to do.
