Well, this Mr. Summerfield is a brave Fellow, Gadzooks he is.
Gadzooks, Jenny, will I never get sense or liberality into your head?
The poor fish claps his hand to his forehead and cries 'Gadzooks!
Gadzooks, a most ingenious contrivance—if we were to go through with it.
Gadzooks, neighbors, but I shouldn't be a whit surprised if that old party is a duke in disguise!
1690s, from some exclamation, possibly God's hooks (nails of the cross) or even God's hocks. Cf. godsookers (1670s). The use of Gad for God (cf. egad) is first attested 1590s. Among other similar phraseological combinations (all from 17c.) were gadsbobs, gadslid, and gadsniggers; in all of which the second elements are sometimes said to be mere fanciful syllables.