Hi, Jochen.
This loss is not reflected in the GenQu losses, as I am sure you have noted already. The resulting loss assessment could have been changed, and thus the loss would not have been reported if it was reassessed as below 10%.
The closest in time is one loss at 22.05.1943, and one on 08.06.1943.
Please find attached these records:
http://www.ahs.no/ref_db/lw_loss_pub...?lossid=107343
http://www.ahs.no/ref_db/lw_loss_pub...?lossid=107344
As a curiosity, the G-2 was later lost by JG 5 in December 1943...
Regards,
Andreas