First question is, does Tail Gunner proc when Ghost makes primary attacks from its "special" (rear) firing arc? Or does calling it a special arc rather than an auxiliary arc disrupt this?

Second question - if any VCX uses Dorsal/Autoblaster Turret to shoot an enemy that happens to be in the rear arc at the appropriate range, does Tail Gunner proc? This would apply to the Combat and End phase attack if Ghost is equipped.

Please discuss. Would like to implement.

Tail Gunner does not work with the Ghost. It does not have a rear facing auxiliary arc. It has a special arc, so Tail Gunner will not do anything for the ship. The only ships Tail Gunner works on is the ARC and Firespray. It would also work on the Tie/SF if it had a crew slot.

Lancer: mobile arc, no tail gunner

YV-666: auxilary arcs but they aren't 'rear facing', so no tail gunner

SF: no crew slot > but I'm waiting for Poe SF with crew for Resistence

PWTs: no auxilary arcs...

Looks like tail gunner is gonna be hanging out on ARCs and maybe Firesprays if they ever see play again."

Wasted opportunity or thoughtful exclusion?

Probably the latter