That is very interesting.
I would say no. The Governor General can talk to anybody he or she wants to talk to. Governor General Michaëlle Jean, Governor General Clarkson before her, and presumably previous governors general have consulted people.
There's the recognized legal representative or the legal adviser to the Governor General, Professor Peter Hogg, but there are many others who are consulted by governors general. Certainly, the Governor General could consult the Speaker of the House. He is one of the eminent recognized positions of authority in our Constitution.
But for formal advice, which is advice in a constitutional sense and a legal sense, the only person who can advise the Governor General is the Prime Minister. It is a very powerful convention. It's a convention, but it's one that is the absolute base of our system of responsible government, government in Parliament, and the crown being part of Parliament, as well as a separate body, which is the personification of the crown in the Governor General.
Let me see if I can explain it a little differently. I have no doubt that when issues like prorogation or dissolution come up, the governors general widely consult. For example, if you read Adrienne Clarkson's memoirs, she makes it very clear that when Prime Minister Martin was returned with a minority in 2004 or 2005, it was almost evenly balanced. I believe it's the Parliament in which Peter Milliken as Speaker cast more deciding votes than had ever been cast before. That's in total and not just for any Speaker.