There are two RCI systems: Weeks and Points. Some resorts trade in both, some offer availability in both.
The question is not what you are depositing into RCI -- a fixed week or points from some points-based system. The critical thing is where in RCI you are seeking inventory -- RCI Weeks inventory or RCI Points inventory. They are two separate banks of inventory.
I don't believe there is any such thing as an OGS in the RCI Points inventory, but there is one in Weeks.
As far as I know, the only way to search in RCI Points would be to watch the Sightings board and then manually check in Points several times daily once DVC starts making deposits.