Greg, I didn’t do the job with the PVC conduit, so I don’t know what was done.
As for my job, the panel had both the disconnect and the meter base, so I simply landed the GEC on the ground buss.
When I installed a bank of meters for an RV park (individual meter bases), I landed that GEC in the disconnect. IIRC, the meter socket neutrals were factory bonded to the enclosures.