Group Level Wiki: Update user documentation

doc/api/api_resources.md

@@ -80,7 +80,7 @@ The following API resources are available in the project context:
 | [Vulnerability exports](vulnerability_exports.md) **(ULTIMATE)**    | `/projects/:id/vulnerability_exports`                                                                                                                                                                       |
 | [Project vulnerabilities](project_vulnerabilities.md) **(ULTIMATE)**   | `/projects/:id/vulnerabilities`                                                                                                                                                                            |
 | [Vulnerability findings](vulnerability_findings.md) **(ULTIMATE)**  | `/projects/:id/vulnerability_findings`                                                                                                                                                                |
-| [Wikis](wikis.md)                                                   | `/projects/:id/wikis`                                                                                                                                                                                 |
+| [Project wikis](wikis.md)                                           | `/projects/:id/wikis`                                                                                                                                                                                 |
 
 ## Group resources
 
@@ -108,6 +108,7 @@ The following API resources are available in the group context:
 | [Notification settings](notification_settings.md)                | `/groups/:id/notification_settings` (also available for projects and standalone) |
 | [Resource label events](resource_label_events.md)                | `/groups/:id/epics/.../resource_label_events` (also available for projects)      |
 | [Search](search.md)                                              | `/groups/:id/search` (also available for projects and standalone)                |
+| [Group wikis](group_wikis.md) **(PREMIUM)**                      | `/groups/:id/wikis`                                                              |
 
 ## Standalone resources
 

doc/api/group_wikis.md

@@ -5,9 +5,9 @@ info: "To determine the technical writer assigned to the Stage/Group associated
 type: reference, api
 ---
 
-# Wikis API
+# Group wikis API **(PREMIUM)**
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/212199) in GitLab 13.2.
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/212199) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.5.
 
 Available only in APIv4.
 

doc/api/wikis.md

@@ -5,7 +5,7 @@ info: "To determine the technical writer assigned to the Stage/Group associated
 type: reference, api
 ---
 
-# Wikis API
+# Project wikis API
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/13372) in GitLab 10.0.
 

doc/user/group/index.md

@@ -391,6 +391,51 @@ milestones.
 
 [Learn more about Epics.](epics/index.md)
 
+## Group wikis **(PREMIUM)**
+
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/13195) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.5.
+> - It's [deployed behind a feature flag](../feature_flags.md), enabled by default.
+> - It's enabled on GitLab.com.
+> - It's recommended for production use.
+> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-group-wikis).
+
+CAUTION: **Warning:**
+This feature might not be available to you. Check the **version history** note above for details.
+
+Group wikis work the same way as [project wikis](../project/wiki/index.md), please refer to those docs for details on usage.
+
+Group wikis can be edited by members with [Developer permissions](../../user/permissions.md#group-members-permissions)
+and above.
+
+### Group wikis limitations
+
+There are a few limitations compared to project wikis:
+
+- Local Git access is not supported yet.
+- Group wikis are not included in global search, group exports, backups, and Geo replication.
+- Changes to group wikis don't show up in the group's activity feed.
+
+You can follow [this epic](https://gitlab.com/groups/gitlab-org/-/epics/2782) for updates.
+
+### Enable or disable group wikis **(CORE ONLY)**
+
+Group wikis are under development but ready for production use.
+It is deployed behind a feature flag that is **enabled by default**.
+[GitLab administrators with access to the GitLab Rails console](../../administration/feature_flags.md)
+can opt to disable it for your instance.
+
+To enable it:
+
+```ruby
+Feature.enable(:group_wikis)
+```
+
+To disable it:
+
+```ruby
+Feature.disable(:group_wikis)
+```
+
 ## Group Security Dashboard **(ULTIMATE)**
 
 Get an overview of the vulnerabilities of all the projects in a group and its subgroups.

doc/user/permissions.md

@@ -243,6 +243,7 @@ group.
 | Action                                                 | Guest | Reporter | Developer | Maintainer | Owner |
 |--------------------------------------------------------|-------|----------|-----------|------------|-------|
 | Browse group                                           | ✓     | ✓        | ✓         | ✓          | ✓     |
+| View group wiki pages **(PREMIUM)**                    | ✓ (6) | ✓        | ✓         | ✓          | ✓     |
 | View Insights charts **(ULTIMATE)**                    | ✓     | ✓        | ✓         | ✓          | ✓     |
 | View group epic **(ULTIMATE)**                         | ✓     | ✓        | ✓         | ✓          | ✓     |
 | Create/edit group epic **(ULTIMATE)**                  |       | ✓        | ✓         | ✓          | ✓     |
@@ -256,10 +257,12 @@ group.
 | Create/edit/delete group milestones                    |       |          | ✓         | ✓          | ✓     |
 | Create/edit/delete iterations                          |       |          | ✓         | ✓          | ✓     |
 | Enable/disable a dependency proxy **(PREMIUM)**        |       |          | ✓         | ✓          | ✓     |
+| Create and edit group wiki pages **(PREMIUM)**         |       |          | ✓         | ✓          | ✓     |
 | Use security dashboard **(ULTIMATE)**                  |       |          | ✓         | ✓          | ✓     |
 | Create/edit/delete metrics dashboard annotations       |       |          | ✓         | ✓          | ✓     |
 | View/manage group-level Kubernetes cluster             |       |          |           | ✓          | ✓     |
 | Create subgroup                                        |       |          |           | ✓ (1)      | ✓     |
+| Delete group wiki pages **(PREMIUM)**                  |       |          |           | ✓          | ✓     |
 | Edit epic comments (posted by any user) **(ULTIMATE)** |       |          |           | ✓ (2)      | ✓ (2) |
 | Edit group settings                                    |       |          |           |            | ✓     |
 | Manage group level CI/CD variables                     |       |          |           |            | ✓     |
@@ -287,6 +290,7 @@ group.
    - The [group level](group/index.md#default-project-creation-level).
 1. Does not apply to subgroups.
 1. Developers can push commits to the default branch of a new project only if the [default branch protection](group/index.md#changing-the-default-branch-protection-of-a-group) is set to "Partially protected" or "Not protected".
+1. In addition, if your group is public or internal, all users who can see the group can also see group wiki pages.
 
 ### Subgroup permissions
 

doc/user/project/wiki/index.md

@@ -19,6 +19,9 @@ You can create Wiki pages in the web interface or
 [locally using Git](#adding-and-editing-wiki-pages-locally) since every Wiki is
 a separate Git repository.
 
+[Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/13195) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.5,
+**group wikis** became available. Their usage is similar to project wikis, with a few [limitations](../../group/index.md#group-wikis).
+
 ## First time creating the Home page
 
 The first time you visit a Wiki, you will be directed to create the Home page.