---
title: posixGID
framework: Collaboration
role: symbol
role_heading: Instance Property
platforms: [macOS 10.5+]
path: collaboration/cbgroupidentity/posixgid
---

# posixGID

Returns the POSIX GID of the identity.

## Declaration

```swift
var posixGID: gid_t { get }
```

## Return Value

Return Value The POSIX GID of the group identity.

## Discussion

Discussion The POSIX GID is an integer that can identify a group within an identity authority. GIDs are not guaranteed to be unique within an identity authority.