Laparoscopic magnetic gastro-ileostomy (MagGI) is a novel technique in bariatric and metabolic surgery that utilizes magnetic compression anastomosis (MCA) to create a gastro-ileal bypass. This procedure is designed to enhance weight loss and metabolic outcomes while minimizing complications associated with traditional stapling and suturing techniques. The MagGI technique builds upon the single anastomosis sleeve ileal (SASI) bypass concept, offering a minimally invasive, biofragmentable magnetic approach to revisional and primary metabolic surgery, particularly in patients experiencing inadequate weight loss or type 2 diabetes recurrence after sleeve gastrectomy. Early preclinical and human studies demonstrate the feasibility, safety, and efficacy of MagGI, with promising weight loss outcomes and metabolic improvements. The procedure reduces operative time, minimizes postoperative complications, and eliminates the need for permanent foreign materials. However, nutritional monitoring remains crucial, as some patients experience deficiencies postoperatively. While preliminary results are encouraging, further studies with larger cohorts and long-term follow-ups are necessary to establish MagGI’s role in bariatric surgery fully.