Was the Geiger counter used during the gold-foil experiment?

Question

Was the Geiger counter used during the gold-foil experiment?

Answer 1

You probably mean the Rutherford-Geiger-Marsden experiment, which demonstrated the large-angle backscatter which confirmed the nuclear structure of atoms.

And no, though Geiger later invented the Geiger counter, the detector used in the RGM experiment was a zinc sulfide screen that scintillated when struck by an energetic particle.