I really love that I can look at a tool tip and see how many items I have of a particular item in my bank and inventory of all my characters. It would be really helpful to me and I am sure others if guild banks were included in this feature.

How about a Bagnon option to display on the tool-tip regent bank content only?

Came by to suggest the same above enhancement by Nick15g. The addon BagSync is much smaller than Altoholic and more exclusive to having the tool-tip item count to include guild name and count. It has not been updated to read the reagent bank like Bagnon does. Having both on gives bank and bag info twice (4 lines on the tool-tip plus total).

Temporary solution is putting the reagents back into the guild bank and turning off the Bagnon item count tool-tip for a clean two-liner from BagSync.

the only issue with saving gbank info is that the data tends to be very volatile for large guilds.. those items may not exist there an hour later.

if it's for a personal gbank, Altoholic provides guild-bank tracking.. though that's only part of what it does.