Routing a Misc Destination

Hi guys,
Setup:
I have a FreePBX box with 2 inbound routes, 1 PRI and 1 GV
incoming call to GV goes to IVR with 2 destinations:
dest 1 - exten 1000
dest 2 - Misc Destination (cellphone)

Problem:
when I call the GV num and press 2 (Misc Destination), the call goes out from the PRI and not from GV

Question:
Can I route the Misc Destination to call out from GV only ?

Thanks