Little Pigeon, Middle Prong

I ran the GB several times in Summer 2018. In late April I ran at 1.5ft on the bridge gauge. I agree that this is a minimum level for kayaks. In general I tell newbies 'If it's an Island, in general take the right channel' . 'If it's a bigger rapid, then while there may be several lines, you can typically run left of center or far left and get an easier line'
Well downstream of the halfway point there is a mostly river-wide ledge. It has a pourover type hole in the center. The approach to this ledge is fast, but not terribly technical. At levels 2.0ft and higher you can try to avoid the pourover using a boof right of center (no doubt there is some upper bound to this line, but I am not sure). Otherwise, running far left of this ledge will usually get you good outflow and hit a weaker spot on the hole. For example, a recent swimmer had his boat spit out by this pourover on far river left. I hope that this helps.