RecruitingPhase 2Radiation therapyPROton Therapy for Post Surgical Treatment of GYNecologic CancerThis is a single institution, multi-center, Phase II, single-arm study, using Whole Pelvis (WP) Pencil Beam Scanning Proton Radiation (PBS PRT) in the post-surgical, adjuvant setting for definitive treatment of gynecologic cancers. The purpose of this study is to estimate rate of acute clinician-reported gastrointestinal (GI) toxicity using WP PBS PRT in the definitive treatment of gynecologic cancers in the post-surgical, adjuvant setting.