In order to assign fixed GID for departments in my organization, I would like to be sure not to choose an GID that would be selected in the future for another reason (like a new system group for a new technology).
I can see that GID from 101 to 124 are assigned to system groups like syslog or ssh in my fresh 12.04 installed box.
If I want to assign an GID for the legal department or the accounting department, what should I know before deciding? I was thinking about using number greater than 500, but maybe there is a write policy about this subject.