Collocations for gathering - noun

big, large
small
private, public
informal, intimate
formal
family, political, religious, social
international, national
annual
holiday (AmE)

attend, go to
In some cultures, women are not allowed to attend public gatherings.

have, hold, host, organize
We're having a small family gathering to mark our wedding anniversary.

address

take place

gathering of
The president addressed a gathering of local government officials.

a gathering of the clan/clans (humorous, esp. BrE)
We all go to my parents' at Christmas for the annual gathering of the clan.

information, intelligence