Mortal half-brother of Nyikang and Duwat through their shared father Okwa; mother's identity not preserved in the canonical sources, so Gilo registers as mortal-tier per registry strict-paternal-criterion. Per the canonical Shilluk-Anuak fission-tradition, Nyikang and Gilo had a disagreement; Gilo separated to migrate south and east into the Gambela region (modern Ethiopia-South Sudan border) and founded the Anuak people. Like Nyikang for the Shilluk, Gilo is canonically cited as the culture-hero and founder-ancestor of the Anuak. The Shilluk-Anuak fission is one of the foundational examples of the canonical-Nilotic-language-family eponymous-half-brother-fission narrative-pattern, paralleling other Lwoo-family group dispersions (Alur, Lango, the Kenyan Lwoo) that occurred in the same canonical migration-period c. 1500 CE. Cross-listed in Anuak.