Study objectives are consistent with VA housing recommendations focusing on patient recovery, health services promotion, and treatment implementation evaluation. GMI will be compared to a control treatment condition (CT) on (Specific Aim I; Five outcomes: (Primary Hypothesis 1): treatment engagement; (Primary Hypothesis 1): substance use; (Secondary H2): psychosocial integration (e.g., social support, community participation); (Secondary H3) quality of life/psychiatric indices; and (Secondary H4): number of days engaging in structured/productive work activities in the 6-month follow up. Specific Aim II involves a process evaluation for documenting (A) formative (e.g., developmental), (B) process, and (C) summative outcomes; and Specific Aim III involves estimation of cost of intervention in terms of direct costs, indirect costs of staff, costs of capital and workload measures for future implementation and dissemination research.