There are two 'home' pages on a MemberGate site. The first is the public home page which is the page that users will see when they visit your domain name. The other home page is the members portal page. This is the main page that members will see when they are logged into the site.
Those two main home pages can be edited under 'Content'.
Editing the Public Home Page
To make changes to your public only home page:
Editing the Public Portal can be found under Content Portals Edit Public Portal
Editing the Members Home Page
To make changes to your members only home page:
Editing the Member Portal can be found under Content Portals Edit Member Portal