:term:`CFOUR_GIAO <CFOUR_GIAO (CFOUR)>`
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      Specifies whether gauge-including atomic orbitals are used (ON) or not (OFF). Default: ON for :term:`CFOUR_PROPS <CFOUR_PROPS (CFOUR)>` =NMR and =MAGNETIC, otherwise OFF

      * **Type**: string
      * **Possible Values**: ON, OFF
      * **Default**: No Default

