No. There are no all-inclusive Z-wave locks compatible and useable outdoors. Using a Yale/Schlage/Kwikset outdoors is inviting a very quick demise for the internal components of the rear housing.
One thing that is possible is to find an electronic gate lock made for outdoor use that has a dry contact input which can be wired to something like the Mimolite. The mimolite is compatible with 2GIG Go!Control. The Mimolite would be indoors, with a cable running to the contact input on the gate lock.
Something like this might work. Wire the Mimolite in Parallel with the Exit Button.
The mimolite can then be set for momentary activation, use the NO/COM contacts, and you would essentially have two exit buttons: one physically at the lock, and one that can be remotely tripped.
This of course would not give any sort of remote user code control, but if you use an outdoor D/W contact you can monitor opening/closing.