Inviting a player to a guild requires a guild rank with permission from the Guild Master to recruit new members.
If you have the ability to invite new members there are 2 basic ways to do it:
- Use the Slash Command: /ginvite <player_name>
- Use the Guild pane of the Friends List window:
- Click Add Member button (bottom-right of the window).
- Enter player name to invite to guild and click Invite.