Total Quantity Indexes for Real GDP for Great Falls, MT (MSA) was 112.48800 Index 2009=100 in January of 2023, according to the United States Federal Reserve. Historically, Total Quantity Indexes for Real GDP for Great Falls, MT (MSA) reached a record high of 112.48800 in January of 2023 and a record low of 83.94000 in January of 2001. Trading Economics provides the current actual value, an historical data chart and related indicators for Total Quantity Indexes for Real GDP for Great Falls, MT (MSA) - last updated from the United States Federal Reserve on April of 2026.