Developer permissions by default for the members of a group

We have a wiki for documentation for all the members of the company. Because of LDAP authentication, anyone in my company can sign in to GitLab and a new GitLab user account associated with this user is created.

The wiki is located in a project inside a group like this:

Group visibility: internal
Project visibility: internal

When a user logs into GitLab, he can see the wiki pages but he cannot edit them unless I manually invite him through the members tab and give him developer permission.

I would like that all the users from the company (hundreds) have developer permissions by default (instead of guest) when accessing the wiki so that they can edit it. Is that possible?

Thanks.

anyone?