You may need to try and Odin back to EC05, run the OCR CWM 3.0.2.5. and get a GPS lock first. Then afterwards flash Gingerbread and see what happens.
Dang! I am having the same problem with the latest ROM, no gps fix. I Odin'd back to EC05, got a gps lock in a matter of seconds, and then flashed back to Gingerbread. Still doesn't work. I don't need gps right away so I may just leave Gingerbread on until someone can find a fix. (I even try flashing the gps fix separately and still no luck.)