Does the F/A-22 have a gun??

It does. A slight variation of the good ol' 20mm Vulcan.

How well does it fly slow? Is the pilot comfy at 50-60 kts? Will the
'puter
allow it to get that slow? or is it like a F-16/18/15 that is not great at
slow
speed flat scissor type stuff/

That thing is an aerodynamic wonder, with BIG engines AND thrust vectoring.
It reputedly has the best post-stall maneuvering capability this side of
civilization.
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José Herculano