Maybe it should be changed to Trusted-Kinda. LOL
Seriously, though, guild leaders will often assign "generals" for various GvG ages, but don't want them to have power over other aspects of the guild, thus the "Trusted" status. There are a variety of factors that go into opening GE levels that encompass the entirety of the guild, and so only founders and leaders should be making those decisions. You might trust someone in a large guild to oversee the Iron Age GvG, but not with more weighty guild decisions. So I guess it really is only "Trusted" to a certain extent.