It started on September 11 , 2009 .
The 2009 -- 10 Gamma Ethniki is the 27th season since the official establishment of the third tier of Greek football in 1983 .
Gamma Ethniki started on September 11 , 2009 .
The 2009 -- 10 Gamma Ethniki is the 27th season since the official establishment of the third tier of Greek football in 1983 .