GLUFS is the student council of the physics students. The council is subordinate to LUNA, and its task is to monitor the studying environment at Fysicum. If you are unhappy with a course, feel unfairly treated, want to complain about the ventilation or have any other opinion or thought on your situation as a physics student, this is were you should turn first.
GLUFS arranges social activities as well, for exmaple dinner parties or quiz nights.
If you want to know what's happening, follow GLUFS on facebook.