There has been much talk here about Go Anywhere Do Anything watches.
The Truth is that almost any watch can be a GADA watch if you are really honest with yourself. GADA is more a description rather than an actual category.
In fact, the most GADA watch I have noticed so far is the Apple Watch. A dive watch can be used in all but the most formal WHITE TIE events, a "dress watch" of today is not much different from a Wermacht field watch or an early era Pilot's watch (the Santos).
My brother who is an avid watch fan wore a TAG Heuer Diver to his own wedding.
What we often call a GADA here is in fact a Sport Watch. No idea where that name came from. People who do sports usually wear a GShock.
Why even bother getting a GADA? Just get what you want and then declare that it is a GADA.