A rotisserie grill cooker has a base, a support post, a cantilevered rail, a cage-drive assembly, and a firepit. Together these enable a user to suspend a rotating food rack over a heat source. Specifically, the base is a rigid structure to which one end of the support post is pivotably connected. The cantilevered rail extends away from the support post over the heat source. The cantilevered rail is positioned offset from the base along the support post, so the food rack can be suspended in between the cantilevered rail and the firepit that traverses through the base. The cage-drive assembly is a motorized support system, is slidably engaged along the cantilevered rail, and rotates the food rack. The support assembly has a carriage that is connected in between a drive system and the cantilevered rail. The heat source is within the firepit and heats the food rack.