Giving GM control to an assistance

We have been using roll20 for sometime now.  I have been helping my DM with the technical/computer end of things.  It would be much easier if I had the controls of the GM. Could you set up an assistant GM or allow 2 (or more maybe) people be GM.  The assistant could be assigned by the GM some of the controls. One other idea I had was setting up a token that could have an aura that does reveal for the Fog of War when moved (a torch)

Regarding the Co-GM, this is already a feature. On the Campaign Details page the primary GM can hover over the icon of the person he wants to promote to GM and select promote.  As for the aura/torch idea, this is also an existing feature. It is called Dynamic Lighting. Using Dynamic Lighting you can set the light radius and dim light radius of a token and the visible area will change based on that.  - Gauss