I'm really enjoying Gunbad too - but really I don't mind what we do.
A few suggestions for the future:
More Gunbad.
All the PQ's in a Tier, whatever Tier that may be as long as we can all make it.
Lowbie night - roll some new toons, group up and hit the tier one SC's - pointless, but probably fun.
Find some lairs to hit.
And also:
While were doing these guild nights, how about starting to farm some "ruined equipment" - eg, rather than greeding on them if we dont need them having everyone pass and an officer hit greed. The officer then stores them in the guild bank. That way these can be used for future events, like a treasure hunt or something. We might not have enough to warrant this *yet* but the future looks bright to me.