Expansion card questions: The basic ally gamora card from the drax pack has a “hero response” instead of a “response” The justice ally…

Yes, the text on both cards should be resolved as written. Gamora’s and Wraith’s abilities can only be activated while their controllers are in hero form. Target Acquired probably should have been an interrupt, like most other cards that cancel boost abilities or icons, but you should still be able to resolve it as written: when the boost card is turned face up, but before the boost ability resolves, discard Target Acquired to cancel the boost ability.