Three men, Tuan Le Khac, 39, James Thanh Nguyen, 52, and Vinh Thien Tran, 54, and a woman Thu Loan Phan, 44, were arrested at a house in Buford City last Wednesday, the Fox channel reported this week.
They face charges of cultivation and possession of marijuana with intent to distribute.
Investigators say all four suspects were "actively engaged" in cultivating the marijuana plants at the time of their arrest.
Authorities also seized 100 pounds of processed marijuana, 120 pounds of marijuana processing byproducts, 159 root balls from harvested marijuana plants, and $1,074 in cash.
Investigators said they estimated the value of seized narcotics at around $706,000.
All four suspects are lodged in the Hall County jail.
The use and possession of cannabis is illegal under the U.S. federal law, although the medical use of cannabis with a doctor's recommendation is legal in 33 states and its recreational use is legal in 10 states.