Cookin, I did GAPS for 1 1/2 years. At about 6 months I started getting the same symtoms you had–especially chronic dizziness to the point of black out. That’s when The Perfect Health Diet was new, so I did GAPS with the addition of potatoes, plantains, white rice, which I still ate very (very) minimally. The “safe starches” might have saved my life.
It’s been a year since I quit my version of GAPS, and some of my symtoms went away, but I still struggle with moderate dizziness which gets better month by month.