I have the same issue on this end.
I've created a solution that shows all of my selected records in List View, but displays individual record specifics in a large footer. Given the horrible implementation of Portals in FMGo, this is the best solution for my use on this project. In any event, the footer displays in portrait mode, but disappears in landscape, at least when the footer has a vertical dimension greater than a few hundred pixels (about 350px). This is a very odd problem, and perhaps is a function of the overall screwy screen (re-)drawing issues in FMGo.
The folks at filemaker support referred me to the following link to understand what is going on. Unfortunately, I haven't had time to check it out, but it may be helpful to you, G. Prill. http://help.filemaker.com/app/answers/detail/a_id/7748/kw/7748/session/L3NpZC9GZzZ2Z05uaw%3D%3D
I can reproduce the first problem (lack of header/footer) on filemaker go 1.2 for ipad. They work fine in portrait mode, but disappear in landscape mode.