gitlab-org--gitlab-foss/doc/permissions/permissions.md

Permissions

Users have different abilities depending on the access level they have in a particular group or project.

If a user is both in a project group and in the project itself, the highest permission level is used.

If a user is a GitLab administrator they receive all permissions.

Project

Action	Guest	Reporter	Developer	Master	Owner
Create new issue	✓	✓	✓	✓	✓
Leave comments	✓	✓	✓	✓	✓
Pull project code		✓	✓	✓	✓
Download project		✓	✓	✓	✓
Create code snippets		✓	✓	✓	✓
Create new merge request			✓	✓	✓
Create new branches			✓	✓	✓
Push to non-protected branches			✓	✓	✓
Remove non-protected branches			✓	✓	✓
Add tags			✓	✓	✓
Write a wiki			✓	✓	✓
Manage issue tracker			✓	✓	✓
Manage labels			✓	✓	✓
Create new milestones				✓	✓
Add new team members				✓	✓
Push to protected branches				✓	✓
Enable/Disable branch protection				✓	✓
Rewrite/remove git tags				✓	✓
Edit project				✓	✓
Add Deploy Keys to project				✓	✓
Configure Project Hooks				✓	✓
Switch visibility level					✓
Transfer project to another namespace					✓
Remove project					✓

Group

Action	Guest	Reporter	Developer	Master	Owner
Browse group	✓	✓	✓	✓	✓
Edit group					✓
Create project in group				✓	✓
Manage group members					✓
Remove group					✓

Any user can remove himself from a group, unless he is the last Owner of the group.