Am I right in that Giganta can use her attack SP after using Charge or Sidestep?

THUNDEROUS STOMP: When Giganta moves 3 squares or less and actions resolve, she can use Quake as a free action.

CHARGE Give this character a power action; halve its speed value for the action. Move this character up to its speed value and then it may be given a close combat action as a free action. This character ignores knock back

SIDESTEP Give this character a free action; it can move with a locked speed value of 2.

I would say yes to the sidestep and yes if you charge no more than 3 squares.

Yes, you are.

thanks for helping out :O)

Friggin awesome Giganta!!!

That's what you meant, right? lol