Homeless Veterans with SUDs represent one of the largest and most chronic groups of psychiatric patients treated in the VA Healthcare System. With the ongoing execution of VA's "Plan to End Veteran Homelessness," Veterans entering housing require interventions that can be feasibly implemented with minimal reorganization of existing services. GMI is based on motivational interviewing, an empirically valid treatment that aligns with Veteran-centered recovery models including Harm Reduction and more traditional treatment philosophies. The investment in GMI for VA housing may be minimal as it requires only a few staff to operate in relatively short time (e.g., 4 sessions, 90-min each) with modest (20 hours) staff training. It can be layered onto existing services with little interruption or reorganization of staff, and it has potential to be offered to larger numbers of Veterans with SUDs in VA housing who would otherwise not receive this intervention.