I am no expert, this is my guess. It is probable that the GIS data you would like to use is based on commercial copyrighted maps. I am fairly sure that would mean it CANNOT be used to update OSM. You could put notes on the Standard Layer indicating where a new street is, This many may encourage mappers to survey them, Maybe you? Perhaps a link to a source of some open data, like street names and postal codes, also codes could be put into the note. But you would have to make sure that, the data is open.
![alt text][1]
[1]: https://help.openstreetmap.org/upfiles/Add_a_note.JPG