Dan Girellini wrote:

Do you have to positively ack the gear down instruction?

The first time I flew into a military base(in a 172), I got spooked
by the "check gear down" reminder. I thought that maybe the tower
knew something I didn't, so I actually looked out the window to verify
that my gear was still there.

Now when they say "check gear down" I just reply, "gear down and
welded in place".

John Galban=====N4BQ (PA28-180)