Gadzooks is an old-fashioned exclamation that expresses surprise or amazement. If you are looking for synonyms for gadzooks, there are several options that you can choose from. Some alternatives include "zounds," "egad," "goodness gracious," "holy cow," and "my goodness." All of these words convey a sense of astonishment or shock and may be used in a variety of situations. If you're looking to add a bit of humor or personality to your speech or writing, you may want to try using one of these gadzooks synonyms instead of the more common "wow" or "amazing."".