---
title: "init(posixGID:authority:)"
framework: Collaboration
role: symbol
role_heading: Initializer
platforms: [macOS 10.5+]
path: "collaboration/cbgroupidentity/init(posixgid:authority:)"
---

# init(posixGID:authority:)

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

## Declaration

```swift
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

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

### Related Documentation

- [Identity Services Programming Guide](apple-archive/documentation/Networking/Conceptual/IdentityServices_ProgGuide/Introduction.md)