As far as testing for dyslexia I'm still looking for where this can be done.
My DD9 was just diagnosed with dyslexia a few weeks ago. She had testing with the same psychologist that administered her WISC and achievement tests. It can be tricky to suss out dyslexia in gifted kids, but it becomes more noticeable as they get farther along in school. My DD was reading at a grade 5-6 level in grade 2... why would anyone have been worried? I was, especially because her CTOPP testing showed phonological awareness in the 58%-ile. Even to my at-the-time-didn't-know-anything eye, this looked funny. Her other achievement tests were all over the map. Her oral reading scores with the GORT were >99%-ile, but her spelling on the WIAT was in the 53-%ile. Everyone at the school chose to focus their attention on her ADHD and strenghts and kept reassuring us that her spelling would even out. It took us two years and finally going back to the private psychologist to get a diagnosis.
If you suspect dyslexia, here is a link to an amazing series of on-line lectures that will provide you with more information. I watched them one after another for hours. I wish so much that I had had that information two years ago. The lecturer described my DD to a tee!
Take the time and watch the videos!
http://www.brightsolutions.us/