We're flying via HKG next year and I was reading up on the ins and outs, especially the very good FAQ in this forum. Of particular interest was the information about the people mover direction restricted to arriving or departing pax and its impact on what lounge you should use.
I looked for a source of arrival gate information to see if I could identify a trend in gate assignments, e.g. flight XYZ usually gets assigned to gates 60 - 70. I couldn't find this data anywhere and found an old thread here where someone was looking for the same thing and was told that it is not available.
On a related subject, we'll be arriving in CX F and have opted for a four-hour layover before departing in KA F. we'd like to use a cabana in The Pier lounge but if our departing flight is from terminal 2, i'm beginning to wonder if it would be worth the hassle of walking all the way back despite having the time. We would like to have a look around the airport, at the shops, etc., as well.
So just out of curiosity, I was wondering what area of the airport CX889 (from YVR) would be likely to arrive at and from what area KA804 (to PVG) would be likely to depart from.

Last week when I flew into HKG on 889 we gated ( this was the closest I've been ever ) at Gate 34 but usually (most of the time when I fly on this flight) the gate is at the 60 range.
As for PVG, I've seen gate 24 ( around noon time )

There is no pattern for your case. However, Terminal 2 only exists for check-in purpose (in essence there is only one terminal for transit) and all CX and KA FLTs depart from Terminal 1.

The short regional CX flights seem focused on gates 60-70 - my flights to TPE and NRT almost always leave from out there. North America is usually close in, 1-4 are pretty common.

PVG has been pretty random in my experience. I've seen as low as 3 and as high as 70. You could take a sampling over the period of a few days and see if there is any consistency - maybe gate distribution for some flights/destinations is more Gaussian than others

My TPE flight 3 weeks ago was from gate 33, but was moved to 40-something. And then I had the SIN flight leaving from gate 50. Although, they were probably out of their usual places, as there were plenty of swaps going on that weekend.

US flights (except for 888, which goes via YVR) usually go out of 3, 4, 21 or very occasionally 19, due to the extra security checks required at the gate. Other than that, it's pretty much a random draw. Late night long-hauls mostly go out of 60-70, except the two LHR flights which almost always seem to go out of 1 and 2 (at least in my experience). As for regionals, I've had gates all over the airport, and even, gulp, the 520s once or twice.

Arrivals depend on where the aircraft is scheduled for next. So if your 77A on 889 is scheduled to turn around as 830 back to JFK, chances are you'll arrive at one of the gates for US bound flights listed above.

Thank you everyone for the replies. I saw a departing flight to PVG scheduled from one of the 520 gates. I assume these are bus gates since there doesn't appear to be any place for the plane there.
I guess we'll just have to wait and see what happens. If anyone has an idea of how long it would take to walk from The Pier to the 520 gates without stressing, e.g. just walking normally, that would be extremely helpful.

1.) Stay at the Wing, not the Pier, waiting for the 5xx gates. It's about a 3-5 minute walk down from the Wing. Noe that all 5xx gates require a bus; so that's the time to get down from the lounge to the bus departure (which is where your boarding card is processed). If you insist on staying at the Pier, I'd allocate about a 10-15 minute walk depending on your walking/looking at aircraft along the way speed. Note you cannot take the train back from the Pier (which is near Gate 62), so if you insist on coming back to the 5xx gates (which are really underneath gates 15 and 21) you will need to walk it.

2.) The 5xx gates all require busses, departing from a similar area. 501-511 are proper gates in a terminal-type facility, but unfortunately it is an island in the middle of the apron and requires bussing. The others are traditional stairway-to-the-aircraft boarding accessible by bus. You've got a higher chance of the 5xx gates on the morning departure with KA's A321 to PVG (and note that plane won't have F on it) than you will with the A330 (which probably will have F, but there's always the outside chance KA swaps on you to one of their two-class configs).

It's random, I've actually never used the same gate once on CX before.

Gate assignment is pretty regular for me. Whichever flight I'm arriving on will park at gate 60+ grrrr.....

CX gate assignment has been pretty random for me, but I know that HKIA prioritizes some gates to particular airlines (which are closer to their lounges for the convenience of their premium passengers). Take for example UA/TG/LH and their usage of the 40s/60s gates or BA/SQ/QF/KE with the ones starting from 15.

The majority, I'd say 60-70%, of CX flights depart from gates close to the CX lounges: 1-4 (near the Wing), low- to mid-20s (near the Cabin) and the 60s (near the Pier). The rest are pretty random, a bunch in the 30s and some random ones in the 40s and at 15-19.

Mate, it's not random...there's definitely some predictability to it. In general I've noticed there is a pattern with
a.) morning KA departures,
b.) CX's USA-bound flights (as explained well above),
c.) CX's evening LHR departures on 74A (also explained above),
d.) Proximity to lounges for CX flights....especially if departing from the outer concourses (gates 40-71). More often than not CX departs from the 60s, which is on the same side as the Pier lounge. You will see certain airlines (Lufthansa, Air Canada, Thai, KLM) who are almost always parked on the 40s side, while I've noticed UA is almost always parked at low # 60 gates.
e.) SQ's afternoon A380 departure and KE's nighttime A380 departure are virtual locks to get gate 15.
f.) BR seems to get gate 36 or 63 (which are next to each other) for afternoon departures.
g.) EK frequently utilizes the 60 gates.

Yes, while there are patterns for selected FLTs, it is random with regard to OP's question. OP first asked for the arrival gate of FLT, and all known patterns are departure-bound. OP then asked for the departure gate of a KA FLT that could be operated by either a 330 or a 320, and the latter sometimes depart from the satellite terminal.

Since North Satellite Open I have been always boarding via gate 501-510, with 1 exception of mid-day A321.