You might be better worrying about how you can be in the procedural hold at Gloucester, and then get cleared for the procedure to the runway requiring a descent through class G airspace above the ATZ where anyone can just bimble through without even talking to ATC.
Much like the ILS at Gloucester on the Westerly runway where, although it is marked as an instrument approach zone on charts, someone could legally fly straight through it (and have) again without talking to ATC - very interesting on a marginal VFR day.