The Photogate Bracket (PGB-VDS) will work on a PASCO track with a minor modification.
The slot on the side of the PASCO track is a little narrower than the slot on the side of the Vernier track. The Vernier Photogate Bracket has little nubs that keeps the bracket upright; these nubs are too wide to fit the PASCO track. If you were to trim these nubs with some clippers (or a tool known as a nibbler), the bracket would fit fine. If you removed too much, the brackets would still work; you would be relying on friction to hold the bracket in place.