I agree with transrelativity. It sounds like a classic case of crossed wires, and the trial GM was wrong to give such a harsh statement to the other guild. Similarly, the other guild was wrong to take it at face value and not get the applicant's side. There's always two sides to a story, and while you may weigh the GM's opinion more than the applicant's (after all, you know the GM probably very well), it's never good to take such a black and white approach to disputes.

OP, it was a blessing that those guilds did not let you in with those attitudes.

Transfer to a new server, I say, and be glad to be off this realm. Be prepared, also, because even raiding guilds from different realms do communicate. Have a polite, thorough explanation ready when they ask you about the feedback they got from XYZ guild you app'd to on your old realm (and any good guild will). Don't badmouth, just like a job interview. Explain the communication confusion, and make sure you can tell the prospective guild what you've learned and how this situation has bettered you as a player.

Good luck.