The new channel will be chaired by former BBC political presenter Andrew Neil and promises to "change the face of news and debate in the UK".
It was announced last week that Neil will also lead the channel's evening news coverage.
Ex-BBC host Simon McCoy, ITV veteran Alastair Stewart and ex-Sun journalist Dan Wootton are also on the line-up.
It will launch with a special show called Welcome To GB News, and will be available on Freeview channel 236 as well as other platforms including Sky, Virgin Media and Freesat.
GB News will provide "a new approach to how news is done - stories that really matter to people in the United Kingdom", its Freeview listing says.