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.
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