A Governance meeting can be started by any circle member. However, a warning will appear if you are not the Circle's Secretary, letting you know that you will be serving as the Secretary by opening the meeting.
(Governance Meetings are scheduled by the Circle's Secretary and should be announced with plenty of warning so other circle members have a chance to attend. However, if the Secretary is not available, anyone else may serve as the temporary Secretary.)
When you first create your GlassFrog organization, you will open a Governance meeting to create the initial structure of your organization.
Meetings are opened from the Circle page. You can get to that page by clicking on the Circle name on the Org chart.
From there, click on the "Start Meeting" button in the top right of the circle page, and then select between Tactical and Governance:
The open Governance meeting will look something like this:
How do I assign Secretary, Rep Link and Facilitator?