The general association was to the Victoria River drainage above and slightly below the junction of Wattie Creek and the Victoria (Harvey c1009) (Harvey's Gurindji appears to be equivalent of Eastern Gurindji in this database).
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Gurindji Aboriginal Corporation - https://www.gurindjicorp.com.au/
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).