Ok this is how I solved it,
1. First f all put he 7008S in ModeD
2. Then connect the A2 X2 to Sbus and configure assistant tous SBUS
3. Map Canl9-15 in A2 to the functions you want.
Since the GH3 dont have any possibility to switch between film/still in flight i mapped Pan, Tilt, Mode an Shut...