I've done quite a lot of research on Giles Garnier, and found that there was generally quite a lot of fear about werewolves... especially in France. Why aren't there such famous instances in Germany or Italy?
There are some famous cases of werewolves in Germany.
Peter Stumpp is one, the Wolf von Ansbach another.
There are also some other werewolves in the context of witchhunts. One of those is told in Salzburg, that the son of a burned witch, Barbara Koller, a Jakob Koller, could evade the authorities because he could turn into a wolf. As an aside, the persecution of this Jakob Koller, called Schinder-Jackl, lead to the execution of about 130, mostly adolecent vagrants in the years 1675 to 1680.
Despite the importance of wolves for the germanic folklore and also the German folklore - for example there are a lot of cities with wolves in their coat of arms, Wolfgang was quite a popular name - the Germans in the Early Modern Period were very afraid of wolves and hunted them relentlessly, even moreso than the French. Wolves and bears seemingly had good preconditions to breed during and after the Thiry Years War: depopulated villages, livestock gone feral. Many communities were posting bounties on them, and hunting became not only popular, but a necessity for the noblemen:
"Georg II. von Sachsen und seine Jagdkumpane erlegten zwischen 1656 und 1680 nicht weniger als 2195 Wölfe und 239 Bären; in Preußen wurden allein im Jahr 1700 4300 Wölfe, 229 Luchse und 147 Bären zur Strecke gebracht."
"George II of Saxony and his hunting buddies killed no less than 2195 wolves and 239 bears between 1656 and 1680; in Prussia there were 4300 wolves, 229 lynxes and 147 bears killed in the year 1700 alone."
David Blackbourn "Die Eroberung der Natur - Eine Geschichte der deutschen Landschaft" 2007
That this fear of (normal) wolves combined with a fear of witches could lead into a fear of werewolves is shown quite strikingly in the Wolf of Ansbach.
Edit: To answer your question, there were famous instances of werewolf trials in Germany. But they were later and not so numerous as in France (by which I mean the lands where French was spoken, as the Franché-Comte, where Giles Garnier was executed, was in the HRE and the Count of Burgundy was a Habsburg during that time).
Follow up question - would fantasy stories of werewolves be less common in areas with more wolves, as they would be a familiar sight and people would be more used to them, as opposed to areas with lower wolf populations, where less was known about them?