>>63983981
>APKWS probably would work
APKWS works because you can just screw it right into the existing parts of 70mm rockets because western arms manufacturers understand the benefits of standardization and modularity.

Integrating one into a Grad rocket would require so much effort (and even if you did it, those dinky fins would probably struggle to steer a projectile that's twice the size) you might as well just design a guidance package from the ground up.