Sending gold from my Horde to my Alliance?

I have a few questions I'm hoping a GM can answer for me or maybe someone else. I have two main characters my Tauren Warrior and Night Elf Death Knight lately though I've been playing on my Death Knight and have been thinking of deleting my warrior but yet there is something about him that makes it hard. So I thought why not make him a bank for my Death Knight he will still be there just not meant to be used. I was going to sell most everything in his bank for the gold and whatever else I could off of him. Now to my questions, if I do make him a bank for my Death Knight is there anyway to get the gold he has and give it to my DK maybe a GM could help me with this if I open a in game ticket cause being a bank he really doesn't need gold and right now my DK could use it more since I am trying to get the last flying level so I can fly 300 mounts. Second way back in October when I first made my warrior he had received the onyx whelpling for 5th anniversary and I am wondering if it would be possible even if I made him a bit later my DK could at least get the pet I don't care bout the achievement just the pet. The main one though is how to get the gold off my warrior since I can't just mail it to him nor put it on the auction house. Any replies would be grateful and if a GM could please offer advice or maybe a way to help by going into my Tauren and sending my Night Elf the gold that too would be grateful they both are on Farstriders. Thank you.