Yes to all those questions, except that I don't have GPSS.
Others do have GPSS, and I'm told it works great.

A note regarding the autopilot question...
Our autopilots can capture the GPS glideslope only on approaches
which list VNAV minima.
For LNAV approaches without VNAV minima, if the profile
shows a dotted line representing the glidepath angle (most do),
the GNS480 presents an HSI-like display with vertical guidance,
but that vertical guidance is not sent to the external GS pointer,
thus preventing the autopilot from locking onto the glideslope.
Lateral guidance, of course, remains available to the autopilot.

"RonLee" wrote in message =
...
I am thinking seriously about getting the GNS480 and need opinions to
(try and) change my mind. The GNS 430 is nice but the 480 has more
features that I like. Anybody using one and making approaches? With
autopilot? with GPSS? Does GPS altitude REALLY work?