Board Thread:Questions and Answers/@comment-91.204.173.172-20131207154728/@comment-24580145-20140222215320

In game, go to your Guild page.

Click "Manage" (found below the Offering tabs).

Scroll down through the listing of your members. Each member should have a small Banish button to the bottom right (I'm saying this while looking at mine in iOS, hopefully Android looks the same!). Use that to force out a player from your guild. The will be a second page to finish the banishing (it is a fail safe so you don't accidentally lose members.)

Hope this works for you!