Our Torah has 2 components, a written one, often called the TaNaCh (an acronym based on the three subsections' Hebrew names) and the oral one (which has been written down and its commentaries are still evolving and being developed). The authority for law rests with the legal codes like the Shulchan Aruch but there are different traditions and opinions within Judaism so there are subtle differences between communities.
As the gospels don't agree with content of both the written and oral laws, they have no authority.