This study aimed to examine the correlation between post-traumatic growth (PTG), spiritual well-being (SWB), perceived social support (PSS), and demographic and clinical factors in Chinese gynecological cancer patients. Through convenience sampling, we conducted a cross-sectional study of 771 adult patients with gynecological cancer. The European Organization for Research and Treatment for Cancer Quality of Life Questionnaire-Spiritual Well-being 32 (EORTC QLQ-SWB32), Post-traumatic Growth Inventory (PTGI), and Multidimensional Scale of Perceived Social Support (MSPSS) were used to measure SWB, PTG, and PSS. A Multiple Linear Regression Model was used to determine the possible factors contributing to PTG. The subscale with the highest centesimal score in the PTGI was the Appreciation of Life Scale, and the lowest was New Possibility. Gynecologic cancer patients with younger ages (B = − 0.313, P = 0.002), perceived more family support (B = 1.289, P < 0.001), had more existential (B = 0.865, P = 0.010), and had religious belief (B = 5.760, P = 0.034) may have more PTG. Spiritual well-being, perceived social support, younger age, and religious beliefs are associated with post-traumatic growth in gynecological cancer patients. Healthcare staff could provide more professional support to younger patients with religious beliefs. Promoting social support and spiritual well-being could potentially serve as effective interventions for boosting PTG among gynecological cancer.