What does the dial plan rule look like?
Does it look like the following?
Voice Services -> SP2 Service -> X_InboundCallRoute:
{OBITRUNK1>(<5551212,,,,2,>1xxxxxxxxx<#>):li}
OR
{>(<5551212,,,,2,>1xxxxxxxxx<#>):li}
I assume you are calling your GV number to make an outbound call via GV.
Why are you doing it this way?
You can just define GV as an outbound trunk on the OBi110 or in FreePBX.