Moving notes from iCloud to gmail

Few minutes ago I easily moved my notes from gmail to iCloud, kind of by accident as I thought I will copy them so can have them on both but it looks like it's not possible. I did that in the notes app. When I'm trying to move it back (if I can choose only one I'd prefer them to be on gmail) I don't get the option - before it was clear 'move to iCloud' and now, although it left few notes in gmail, it's not available to move to. I've got my gmail account details in my iphone and already followed some tips from google but nothing seem to help. Any advice?