Only Glide group admins can add or remove members of a group. Unfortunately, that feature is not available for old groups. In this case, we suggest creating a new group that excludes the users you want to remove.
The new admin group tool is only available for new groups. Glide group admins can not only add or remove members, they can now also promote or demote members as admins.
Promoting another member as admin will give him/her the power to add or remove members as well. A Group chat can have several Admins.