From the looks of the pics(its hard to tell when all 3 are not facing the same way) but it looks to be 3 males. Usually females have a lighter chest. Heres a pic of my female normal looking gould(shes actually split to blue) http://img.photobucket.com/albums/v481/Sango88/My RL pets/Finches/S6301632.jpg shes the one on the far left
and the one on the left with the red head is the female in this pair
http://img.photobucket.com/albums/v481/Sango88/My RL pets/Finches/S6301635.jpg