The University of Michigan hosts briefs, filings, orders, and related memoranda from various stages of the disposition of the case that can be found at: https://diversity.umich.edu/admissions/legal/grutter/
Brief for Petitioner, Barbara Grutter
Brief for Respondents, Lee Bollinger and Board of Regents of University of Michigan
Amicus Filing by United States, filed and argued on behalf of United States for both Gratz and Grutter Brief for Association of American Law Schools, et al filed in Eastern District of Michigan, cited by lower court at page 21; see Gratz v. Bollinger, 122 F.Supp. 2d 811 (E.D. Mich. 2000)
Argument Transcripts and Audio Recording
Supreme Court Oral Argument Audio (available via Oyez)