@ IOhannes
no Gem-meta.pd in the downloaded versions from http://puredata.info/downloads/gem or from deken.
Vanilla 46.7 shows the same problem with Gem
to me it looks like the lib is found, but the creation of the objects fails. for [gemwin] there exists a gemwin.pd in the lib: the object box is drawn like it is ok, but the 'content' cannot be created (list of errors in Pd-console). for [gemkeyboard] there's no gemkeyboard.pd: the object box is drawn partially showing the creation failed.
Gem.dll and Windows 10 not compatible? or is it just my system?
rolf