If you have a two-letter GLO (Alpha Phi, KD, DG, etc.) you could always do the I Love NY logo but with your GLO instead. It might be tad bit on the played out side, but could work.
This is also admittedly dated, but I know some DGs at a school who did Delta Gamma in the same logo as Friends (with the dots and the font, if you can remember)...you could maybe do a Central Perk type thing.
I love the "I Love NY" idea with your GLO's letters! I know of several Theta chapters have played around with this theme with the o in love being a Theta.
I am sure there are ways to play around with your GLO's letters with this theme.
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