I can not find a bug report in game and I don't feel comfortable posting personal info in the bug report forums to get it resolved. So I'll just post what happened and the approximate time.
I opened up the guild bank and since the guild I wanted to put the gold into was not the default one that opens, I had to switch to the guild I wanted to put the gold into. I then put 9k something into my wife and I’s guild. Only we have access to the gold. As I put the gold into the guild bank it disappeared from my inventory but instead of appearing in the guild bank it just disappeared.
Now it's my wife's and I's Guild, we are the Guild Leaders and NO one else, but Her and I have access to the gold. So no one took it out. It disappeared before it even went into the guild bank. I reloaded, re-logged, switched characters and my wife logged in and we could not find what happened to it.
It happened on (03/10/2017 between 7:00 and 8:00 pm cst)