I remember Brutus, David Fordham pairing off with Billy J Smith and David Wright (currently with ABC) to call Brisbane and Gold Coast matches, and of course Origin games, mainly for Queensland audiences.
I seem to recall they did Broncos and Gold Coast games, even though Ch 10 in NSW were doing another match. Here's a match from 1991 with David calling:
http://www.youtube.com/watch?v=TV4gTaVPF3U
I think this match was shown in NSW but late of night on the Sunday.
Same thing happened when Ch 9 got the rights. After Ch 10 lost the rights to Ch 9, Billy J Smith moved to 9 and paired off with Alan Thomas (now a racecaller in Brisbane).
Correct if I'm wrong but NBN also started it in 1992, covering Knights matches mainly for Newcastle audience, and these games were also shown late at night (11.30 or midnight) in Sydney.
Although in 1992 and 1993 there was the occassional game on Saturday night in Gold Coast which was shown both NSW and Queensland, with Big Daz (Darryl Eastlake) calling with Gene Miles.
One game I remember was Wally Lewis' last game, Gold Coast and Penrith in 1992.
Another one, Gold Coast and Newcastle in 1993, which was the Seagulls' only victory that year, and was Andrew Johns' first grade debut.