Goats do not build up a tolerance to worms like sheep do - one of the main reasons why they should not be run together.
However, assuming your goats are inside for the winter months, I would worm them now and re-do a faecal test in early summer/late spring to check on nematodirus (esp if your land had sheep/lambs on it before). If you don't bring in new stock onto the land, house your goats over the winter and FEC test/worm regularly you will over time get your land worm-free. If you can sub-divide the grazing to allow rotational grazing that should help. Keeping the grass longer for the goats helps as well, but then mow at the end of the summer. A good cold winter will reduce overwintering eggs/larvae.
Also it is advised to check for wormer resistance be redoing a FEC about 10 days post-worming.
I haven't wormed my goats in a few years now, same for the sheep - though sheep still get flukicide in a wet autumn like this year.
And btw - grazing your land with cattle in between goats or sheep is an ideal pathway for introducing Johne's into your goat herd/sheep flock.