Here is the official 2010 GP2 Calendar:
8-9 May Barcelona
14-15 May Monaco
29-30 May Istanbul
19-20 June Portimao
26-27 June Valencia
10-11 July Silverstone
24-25 July Hockenheim
31 July – 1 August Budapest
28_29 August Spa-Francorchamps
11-12 September Monza
13-14 November Yas Marina