From what I've gathered a GD3 wage can depend very much on where you fly. Taking BK as an example as it' an airport I know, a GD3 at Clamback & Hennessey will earn I understand $27.50 an hour, where as if they fly at one of the more 'ethical' paying schools then that's about double. For full time you're looking in the region of $36,000 a year I believe.