Hi,
Sorry. I seem to have misinterpreted your query.
While I'm an occassional git user, my knowledge is such that I don't recall the details of the format for the .gitignore file. Consequently, I can't comment on whether the format is exactly the same as the Subversion format, without doing the documentation research. I can confirm that I use the Subversion property to ignore complete folders. In these cases, I don't have the trailing separator character - just the bare folder name.
Perhaps someone with better knowledge of git and Subversion may be in a position to comment on the differences. Alternatively, you could post the specific Subversion property items that aren't operating as you expect, noting your expected behaviour and the actual, observed behaviour. That would reduce it to simply being a Subversion query.
Hope this helps.