Minimally invasive glaucoma surgeries (MIGS) are increasingly used in mild-to-moderate glaucoma cases. Among MIGS, gonioscopy-assisted transluminal trabeculotomy (GATT) is an alternative to conventional glaucoma surgeries. Although GATT is a safe procedure, its potential adverse effects should be considered. The most common complication is hyphema, which is usually transient and resolves spontaneously in the first postoperative week. However, cases of late postoperative hyphema have been reported. We report the case of a patient who developed persistent hyphema after undergoing GATT combined with cataract extraction that was successfully treated with PASCAL photocoagulation, with no further recurrences.