I was just able to log in fine a couple minutes ago. The GMRS system is entirely different (at least it was when I applied) and didn't require this nonsensical "software" that they require for the business band application. You have to make sure the Java is just right, the browser is just right, etc. or it is absolutely going to fail. I followed the steps exactly in this thread and it worked fine.
If you absolutely can't get it working in the next couple days, let me know and perhaps I could do it for you.
As I mentioned in another unrelated thread, the FCC has more bodies than they know what to do with. Have been to their headquarters in DC multiple times. They have secretaries for secretaries of secretaries. People just doing nothing in cubicles. If they wanted to fix this, they could have it fixed in a matter of weeks, using a decent, updated system that actually works, or even a web-based solution that does not require Java. The real issue is that (I feel) they don't want normal people applying for licenses. The radio shops and frequency coordinators are all going to have some old outdated computer sitting around dedicated to nothing but doing these applications. So they're fine. The FCC knows that. I promise you that any major company, or frequency coordinator, or public service agency, has absolutely zero problems with this software. And that's exactly how they want it.