I am not sure if the 32 gtst setup is the same as a 32 gtr, but I think it is.
For track use, first thing to consider is whether you need to follow any rules. For example CAMS 3E and 3J only allow adjustable bushes. 3D and AASA allow adjustable upper arms. I'll assume it's not a factor for you, just mentioning in case.
bushes in the standard arms (somee aftermarket also run bushes like notlec/whiteline plus) will let you adjust by about 1o
you can buy shorter fixed arms, or make them by shortening standard arms.
you can buy adjustable arms.
the adjustable arms available are mostly pretty bad and will not last long (bearings flog out and get noisy). they will allow the must adjustment.
adjustable bushes also have problems with flogging out over time, but they are easy to replace. I get about 4-6 races before I have to replace bushes.
also, set the car at the ride hieght you want before worrying about the camber - as you lower the car you will get more camber at the same time. I often have to take camber out, not add it.