You will gain full control of the guild and can invite/kick whoever you want. The guild is ready for all end-game content.
Completed researches include
Guild shop Lv.5 (MAX)
Weekly Task Slot Lv.2 (MAX)
Weekly Sailing Task Bonus Lv.4 (MAX)
Weekly Trade Skills Task Bonus Lv.4 (MAX)
Weekly Battle Task Bonus Lv.3
Battlefield Sword Lv.4
Completed researches include
Guild shop Lv.5 (MAX)
Weekly Task Slot Lv.2 (MAX)
Weekly Sailing Task Bonus Lv.4 (MAX)
Weekly Trade Skills Task Bonus Lv.4 (MAX)
Weekly Battle Task Bonus Lv.3
Battlefield Sword Lv.4