OK, here's what you do:
For Pi Beta Phi (for example):
(FONT=symbol)PBF(/FONT)
Except you'll need to replace the paranthesis with brackets [[]]
Whenever you want to quite using the font you just use the /FONT part. You don't have to do each GLO separately.
Most of the letters are pretty obvious--D for Delta, F for Phi, P for Pi, K for Kappa etc. There are some weird ones (I think W is Theta!) but you can figure it out.