So if I equip gunner to a ship his ability says to perform another attack if I don't hit and that I'm not allowed to attack any more that round. With any of my ships??? If I attack with gunner and still have 3 ships left who can shoot do I list their shooting turns?

Only the ship on which Gunner is placed. On a card, "you" generally refers to the ship itself, not you the player.

Oh good

Rulebook page 19:

Card Abilities
Many card abilities use the word “you” to specifically reference that Ship card.
Abilities on Ship cards cannot affect other ships unless explicitly specified by the ability.

Gunner is an upgrade card, not a ship card. Technically the 2nd sentence does not apply to it. The first sentence definitely does.

It only applies to the ship it is on.

I suspect it is to prevent Gunner/Gunner or Gunner/Luke combinations where if you shoot and miss then shoot and miss you can take a third shot at shooting.

I guess I'll point out that if you happen to be firing a Cluster Missile on a ship equipped with Gunner if the first missile attack misses you can choose to use Gunner to make a primary weapon attack but doing so prevents you from making the second Cluster Missile Attack.

Nope only the ship that has gunner on it is not allowed to make any other attacks that round.

It only applies to the ship it is on.

I suspect it is to prevent Gunner/Gunner or Gunner/Luke combinations where if you shoot and miss then shoot and miss you can take a third shot at shooting.

I guess I'll point out that if you happen to be firing a Cluster Missile on a ship equipped with Gunner if the first missile attack misses you can choose to use Gunner to make a primary weapon attack but doing so prevents you from making the second Cluster Missile Attack.

page 15 of the FAQ