There is much uncertainty around this name. It is likely to be a people name rather than a language name. Generally it is associated with a location around the Shoalhaven River, though it is worth noting that Tindale includes Gurangada as an alternative name for Ngunawal D3, which, if not coincidental, would extend Gurangada's location further west, 'on highlands west of Shoalhaven River' (Tindale 1974:198).
Tindale also notes that 'the Ngunawal were closely related to the Wodiwodi S58 of Wollonggong'. Both Capell (1963) and Oates and Oates (1970:143) say that there is nothing to report about this name, and Eades (1976:4) and Wafer and Lissarrague (2008) disregard it as a language name.
Shoalhaven area (?), NSW (Oates & Oates 1970:143). ... on highlands west of Shoalhaven River (Tindale 1974:198).
Speaker numbers were measured differently across the censuses and various other sources listed in AUSTLANG. You are encouraged to refer to the sources.
Speaker numbers for ‘NILS 2004’ and ‘2005 estimate’ come from 'Table F.3: Numbers of speakers of Australian Indigenous languages (various surveys)' in 'Appendix F NILS endangerment and absolute number results' in McConvell, Marmion and McNicol 2005, pages 198-230 (PDF, 2.5MB).