Gruiu is a commune in the northeastern part of Ilfov County, Muntenia, Romania. Its name in the Romanian language means "small hill". It i…Gruiu is a commune in the northeastern part of Ilfov County, Muntenia, Romania. Its name in the Romanian language means "small hill". It is composed of four villages: Gruiu, Lipia, Siliștea Snagovului and Șanțu-Florești.