To export data for a flight, select the flights tab, choose the flight you want to export, and long press it. Choose the format you want in the context menu that comes up,
Gaggle supports IGC, KML, GPX and CSV exports. Once the file is created, your phone will offer you the choice of mechanism for sending your data, by email, dropbox, and so on. The actual list depends on the applications you have innstalled on your phone.