Gruiu may refer to several places in Romania:
Gruiu, a commune in Ilfov County Gruiu, a village in Căteasca Commune, Argeș County Gruiu, a village in Nucșoara Commune, Argeș County Gruiu, a village administered by Budești town, Călărași County Gruiu, a village in Făgețelu Commune, Olt County Gruiu, a village in Stoenești Commune, Vâlcea County Gruiu Lupului, a village in Racoviţa Commune, Vâlcea County
See also Grui (disambiguation)