Unless they hit way harder than other rockets I don't think they make it.
What would you base it on?
210mm vs 127mm for the HVAR's, and they're also intended to destroy aircraft through a near-miss.
And I think it should be based on overall ability as a ground attack plane. I mean lets face it, the FM-2 isn't really a GAP, nor is a 109. A Ju-88G isn't really one either, though it would (again, IIRC) fit onto your list.
If we had things such concentrated infintry, and defensive works to bomb and attack, where a 50kg bomb is as good as a 250kg bomb, then yeah, I'd say go ahead and include them.