A better way to be a GM is to work your way up the trust ladder. I'm going to be honest with you I don't think too many people come here looking to hire people as GMs, simply because they could find someone who plays their server who is a tutor to be a GM. This is because people are most likely to trust someone after watching them come back day after day, instead of just getting someone to come in as a GM.
Think about it this way: A company has recently lost an employee. His position is a mid-level management role, where another manager on a lower level has proven to be effective and has earned this spot. Would you as the company give the other guy the job, or bring in somebody completely new? In terms of Tibia it's a trust issue. Without trust people don't get positions on OTs, so you're less likely to get hired by posting here than if you play some guys server for a week.
Also, without an impressive resume you're unlikely to get hired, and unfortunately I wouldn't call this resume 'impressive'.