Here is what I did to get the system to automatically accept the gv calls
add these lines to extensions_custom.conf
below this line in the [googlein] section
exten => s,n,JABBESend(asterisk,${ALERTNAME},Inconing Goolge Voice Call; ${CAL$
exten => s,n,Answer()
exten => s,n,Wait(2)
exten => s,n,SendDTMF(1)
now let's see if we can get the caller id to be passed
add these lines to extensions_custom.conf
below this line in the [googlein] section
exten => s,n,JABBESend(asterisk,${ALERTNAME},Inconing Goolge Voice Call; ${CAL$
exten => s,n,Answer()
exten => s,n,Wait(2)
exten => s,n,SendDTMF(1)
now let's see if we can get the caller id to be passed