Gachi Bolaghi-ye Sofla () is a village in Arshaq-e Markazi Rural District of Arshaq District in Meshgin Shahr County, Ardabil province, Iran.
At the time of the 2006 National Census, the village's population was 84 in 17 households. The following census in 2011 counted 49 people in 12 households. The 2016 census measured the population of the village as 47 people in 16 households.