Gose is a marvelously refreshing beer which originated in Goslar but the current hotbed is Leipzig. There is probably not a better place to imbibe than Gosenschenke "Ohne Bedenken" where their World Beer Award winner Gose is the go-to drink of locals and beer pilgrims alike.
Watzdorfer is a small regional brewery in Thuringia and just up the road in the hilltop Burg Greifenstein you can find two of their fine beers on tap. The castle is a destination in itself and there's a scenic hiking trail to reach it.
Brauerei Schmitt in the town of Singen in Thuringia is a working museum of a brewery with lots of rustic flair. Their beer is well worth seeking out if in Thuringia.
Ohne Bedenken Edelgose is a marvelously refreshing beer example of the style with dry fruity palate and lingering moreish finish.
Bayrischer Bahnhof Gose is a refreshing beer with a nice spicy element of salt & pepper and exemplifies the style