This randomized controlled study aims to evaluate the effect of a mindfulness-based psychoeducation program on hope, cognitive-emotional coping with cancer, quality of life, and psychological well-being in women diagnosed with gynecological cancer. Women receiving treatment for gynecological cancer will be randomly assigned to either an intervention group and a control group. The intervention group will participate in an 8-week mindfulness-based psychoeducation program delivered in small groups via online platforms under the guidance of the researcher. The program will include mindfulness practices such as breathing exercises, body scan, awareness exercises, and guided imagery techniques aimed at improving emotional coping and psychological well-being. The control group will receive usual care. Outcomes will be assessed at baseline, immediately after the intervention, and at 3- and 6-month follow-up assessments.