Filemaker go does not sychronise with filemaker / filemaker server. You could create an app that you enter data then you send the data at a later time. With error checking to verify that the data was sent. There are 3rd party options, such as http://www.seedcode.com/cp-app/ste_cat/gozync and http://www.360works.com/filemaker-sync/
That's totally answered my question!!!
All the best