The provided information, limited to the film's title, year, director, and cast, is insufficient to determine its central subject matter, plot, or thematic content, making an assessment of political bias impossible.

Due to the limited information available, specifically the absence of any plot summary, thematic details, or character descriptions for 'Ga, 1970,' a comprehensive evaluation of its Diversity, Equity, and Inclusion characteristics, including representation and narrative framing, cannot be accurately performed.