To donate to guild, you must be in Server 1. First of all go to the bank person(Juria, Helena or Lurif). Then select the guild warehouse option. From there click support. After that you see two boxes at the top left window. The first one is to donate pxp. The second one is to donate quest items(bluehoney, furious match etc). Then at the bottom of the same window, you will see another box. That box is where you donate money. Give it a try and support the guild :D