[Strategerist]

Good luck with that! No guidance system known to man can handle that acceleration and keep on functioning. Plenty of systems with far lower velocity/acceleration have proven impossible to function after being subjected to high g-forces.

It's perfectly technically feasible to have a GPS guided round, and potentially an active seeker for attacking moving targets - was some work during the SDI days on this.

There have been a lot of advancements in solid-state electronics that can survive high-G and magnetic environments.

[Fractal Trader]

I think that if you look at the history of the 5-inch gun, you will find many references to ill-functioning GPS systems.