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# init(posixGID:authority:)

Returns the group identity with the given POSIX GID in the specified identity authority.

```
init?(posixGID gid: gid_t, authority: CBIdentityAuthority)
```

## Parameters

`gid`

The GID of the group identity you are searching for.

`authority`

An identity authority in which to search for the group identity.

## Return Value

The group identity object with the given GID in the specified identity authority, or `nil` if no identity exists with the specified GID.

## See Also

  [Identity Services Programming Guide](https://developer.apple.com/library/archive/documentation/Networking/Conceptual/IdentityServices_ProgGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40004490)


---

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