From GuildWiki

[edit] Guesting Requirements

• All groups must have Vent or TS with all party members on it, no exceptions
• All HA groups must be R3+
• All GvG groups must be above rank 2000

[edit] Qualifications

• Rank 5
• Mighty Gladiator
• GvG experience in top 300 guilds
• All skills and items unlocked

[edit] In Game Name

Vega Monk