well, i'm using gem ver 0_85 but the message "c:/pd/externs/gem/gem ... couldn't create" is trivial if you have the library open already. i had the object c:/pd/externs/gem/gem in the patch because it opens the gem library for me without using the -lib extension, it's really kind of strange that it works, while still sending an error command to the console.
i'm going to attach a new zip where the grid patch already has the objects in it and hopefully it will solve the problem.