Can someone help me out with their actions. The list four different ones but without cartridge family's they fit the dimensions are meaningless to me.

It appears all they offer is magnum actions. Do they offer an action sized for the 30-06 class of cartridge?

Not yet but they are working on bringing one out.

For a 30-06 class cartridge, I'd find a nice old Mauser and put some money into it. Look at it this way, a GMA action is going to run about $3000. You could buy a good G.33/40, Brno 21, ZG 47, FN or Oberndorf action and really dress it up nicely and come in well under $3000.

The reason I am looking at GMA is they offer left hand. I want matching left hand and right hand for rifles. My son is handicapped by being born left eye dominant.

Gotcha. That explains everything.