Registration for the Vienna Summer of Logic is available online.
Note that the registration for Gentzen Systems and Beyond 3 is possible independent of any other events. In particular, it is NOT necessary to register for the hosting conference. The early registration fee for the workshop is 100 Euros, which will also cover the workshop dinner.
If you plan to arrive in Vienna on or before Saturday, July 12, you might want to consider attending (and registering for) the one-day Structures and Deduction 2014 workshop, which takes place this Saturday.
To be eligible for the early registration prices, please register before June 8 (UTC+2). You also can check a full breakdown of FLoC registration fees and a detailed description of the registration policy of VSL.