Not a Goose owner but had an early pushbutton Pantera, so until someone else comments, I would say that all sounds correct as to how mine worked. Turning the key in the pushbutton lock barrel from the outside had no connectivity with raising (or lowering) the inside lock knob. Been a while, but that's my recollection. If I'm not mistaken, in theory it would be really easy to break into a buttondoor car that was locked from the outside only, as there's a pot metal piece in that (non) "linkage" that could be easily broken by a really hard rap on the button/barrel.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.