Did some research (Wikipedia) - quote: There has been some debate over who should be considered the "father of G-funk". Dr. Dre is generally believed to have developed the sound,[5] but Cold187um and KMG of Above the Law, Laylaw for Lawhouse Production have claimed that they developed the sound. Cold187um and KMG claim that Dr. Dre did not credit the group for pioneering the style when he released The Chronic, his Death Row debut album.[6] They both released records on Ruthless Records prior to that. Warren G and Snoop Dogg were with Cold187um before joining Dr. Dre and Death Row. On Snoop Dogg's Doggystyle album, Warren G and Daz Dillinger from Tha Dogg Pound claim they produced "Ain't No Fun", even though Dre is credited as the album's sole producer.[7]
This song was made in 1990, Always into Somethin came out in '91..although Dre is credited on Murder Rap as a write also so who knows?