It doesn't appear among AU instruments anymore in Pro 7.1. If I launch the old Logic 6.4.3 all is fine. On the contrary I can get RMX Stylus and Trilogy: they work normally.
If I run AU validation I can see Logic scans also Garritan (I get an error message but the program goes till the end).
I can get Garritan (and all the other) in ProTools 6.9.2
What am I missing?