Purpose: Shoulder dislocation is a common injury, with 15-35% of cases involving greater tuberosity (GT) fractures. There is a lack of consensus regarding the optimal management of minimally displaced GT fractures after reduction. This study evaluated the functional outcomes of non-surgical versus surgical treatments for GT fractures with less than 5mm displacement. Methodology: In this retrospective study, patients aged >18 with an isolated GT fracture following 1st-time shoulder dislocation with <5 mm displacement were evaluated more than two years following initial dislocation. Data included several variables such as type of fracture and comminution. Outcomes were measured by American Shoulder and Elbow Surgeons (ASES) and Simple Shoulder Test (SST). Result: Our study involving 43 patients revealed no significant difference in functional scores between the surgical and non-surgical groups, as assessed by ASES (89.1 ± 15.2 vs. 89.8 ± 14.5) and SST (10.4 ± 1.6 vs. 11.1 ± 1.1). However, patients with comminuted fractures and split-type fractures had lower functional scores. Three cases had treatment failure and required surgical management. The dominant side of the injury, level of education, and job status had no significant impact on the patient's functional outcome. Conclusion: We found that the treatment approach, whether surgical or non-surgical, does not significantly affect the clinical outcome of patients with isolated GT fractures and minimal displacement following a primary shoulder dislocation. However, patients with comminuted or split-type fractures had lower functional scores.