QuoteHence to make say international calls I would like to call my GV thru my work land line and thru AA dial out international lines ...
Also, take a look at Localphone, Rebtel, Zenofon.
With Localphone, once set up, you simply dial a unique local number for each contact and it rings straight through -- no IVR, PINs, or two-stage dialing. To most destinations, rates are lower than GV. Depending on destination, quality may not be as good as GV, but they give you a few minutes of free calling at sign-up, so you can test without making a payment.
Rebtel and Zenofon start with the same scheme. Although their rates are higher, they can do some "tricks" which, if applicable to your situation, can save money overall. With Rebtel, your contact can hang up and call back the local number sent as caller ID. If s/he does this quickly, Rebtel does not bill you at all, though your contact is now using cell minutes or paying for a local landline call.
Zenofon has the option to call you back before completing the call. Of course, they then charge you for both legs, but if outgoing calls are costly from the phone you are using (e.g. hotel room or prepaid cellular in most countries), this can be a big saver.