Your email address gives you access into the GVO service. It is possible to have user accounts in more than one GVO (and your user access level can be different in each one) using one email address.
If you have an account in more than one GVO (multiple GVOs) then when you sign-in the system will ask which GVO you wish to go into - select the one you wish to work in and it will open up.
If you wish to switch to a different GVO then you select your email address at the top of the screen (top right) and a drop-down will open up where you can access your profile, your tasks and also to switch GVOs.
This list of GVOs where you have an account will appear - select the one you wish to swap to (no need to logout and login again).
