I would first find out exactly what caused the camber shift on your front. If it turns out to be a part that the aftermarket coilover doesn't replace, then that damaged part will still be there. Even if the coilover kit does allow you to dial camber back in proper range, the damaged part will likely still cause other problem(s).
For example, if it's a bent lower control arm or blown strut bearing, you'll be much better off just replacing it. Probably be less expensive too.
Now then, if it turns out to be the strut itself that's bad, then maybe it's worth considering switching to coilovers all together. If yours is a GT2, it should have electronic suspension control, and that means even a single strut replacement might be rather expensive. A good coilover kit starts at about $1200-$1500, plus labor for install, of course, unless you DIY. Still, I would only recommend it if you're a one of us performance car nuts and already considering lowering your car and possibly switching over to coilovers. In that case, a damaged strut provides a convenient excuse. Otherwise, if this is your daily driver and you're not really into performance
mods, there is a lot to be said for keeping the car stock and unmolested.