If thats what the group want then I've got no problem with putting a monthly update on a facebook group.
Some months may have more news than others, and most of the group will have probably seen it on the GAGB pages already, but a set update is a nice way to keep everyone informed. I know I miss lots of posts on facebook, so having a summary would be good.
Saying that I'd only put it on group pages by invitiation only, I really dont want to be spamming groups in the name of the GAGB.
Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better. - Samuel Beckett