Bloggs:
It can't be an overlay approach; no mention of the VOR anywhere (apart from it's location) and the last waypoint is the runway threshold - can't use the VOR for that. Have a look at the 30 VOR approach from this page; 10 degrees different on the inbound track; hardly likely to be an overlay:
The FAA cancels any overlay approach to a given runway at the time they chart a straight-in RNAV IAP to that runway. The two VOR IAPs at KGGW were titled "VOR or GPS Rwy XX" when they were overlays.
https://www.faa.gov/air_traffic/flig...lts&nasrId=GGW