RKSS Seoul Gimpo: seven years on one airport, and almost nobody has noticed

A man called Graeme bought this airport and reviewed it twice. On 9 May 2023 he
gave it two stars and wrote that Gimpo was a must-have destination for him but
that the scenery was, in his words, "below average". Eleven days later, on 20
May 2023, he was back on the same product page saying it was nice, that the
coming update would make it nicer, and that it might deserve five stars. Both
reviews are still up. They are two of the eight that exist.

That is the entire problem with judging Asian Airports' RKSS Seoul Gimpo. It has
been on sale since 24 March 2022. It has been patched at least ten times since,
most recently on 18 August 2026 — two days before this was written. Nobody
writes about it. There is no AVSIM thread. There is no written review of the
MSFS version anywhere. There is no review video: search YouTube and you get a
BAe 146 landing on 14L and a Korean home-cockpit builder taxiing. The one thread
on the official forums, "Seoul RKSS Gimpo.. Worth it?", was posted on 5 August
2022 and has received zero replies in four years.

So the record has to be assembled sideways, and when you do that it turns out to
be more informative than the reviews are. Three separate people have published
free patches for this airport on flightsim.to — one to make the control tower the
right size, one to give the aprons static aircraft, and one, from the AIG
community, to rebuild the AI ground routing. You can read those files as
criticism, because that is what they are: a list of the things the paying
customers went and fixed themselves. And you can read the changelog as the
developer's answer, because most of those things are now closed.

The other half of the story is that Gimpo is a two-horse race. Double T's RKSS
sits on the in-sim Marketplace at \$18.49, on iniBuilds and on simMarket, and it
has been rated 3.0 out of 5 across 25 Marketplace evaluations, 28% of which are
one star. Asian Airports' version sells in exactly one place, needs a proprietary
installer app, and cannot be bought on Xbox at all. It is also, by every measure
in the public record, the better airport. Whether that is worth the extra money
and the extra friction is the actual question.

This review is drawn from 21 sources: the simMarket listing and its eight buyer
reviews, four competing or sibling store listings, two simFlight articles, four
community mod pages, four official MSFS forum threads, a price comparison, an
X-Plane comparison and two videos. Reddit is blocked in this environment, so the
sentiment-at-a-glance that would normally sit alongside all of this is missing.

What you are actually buying

One product, one download, both simulators. There is no separate MSFS 2024
build, no upgrade fee between the two, and no second SKU — PID 16408 covers
them both, and FS Addon Compare lists the same single simMarket price under both
an MSFS2020 and an MSFS2024 heading.

Price	€20.00 at simMarket (30-day low: €18.00)
Upgrade price	€15.00 if you already own the FSX/P3D or P3Dv5 Gimpo from simMarket
Version	5.5, released 18 August 2026
Download	279.16 MB, 1.1 GB installed
Stores	simMarket only — no Marketplace, no iniBuilds, no Contrail
Platform	PC only. Delivered through simMarket's simInstaller app
Developer store	None. Asian Airports has no website; simMarket is both publisher and seller

The price needs a note. simMarket's terms say displayed prices "include the
respectively applicable value added tax", which for a browser session with no
resolved country means the applicable rate is zero — so €20.00 is the net figure,
not a consumer price. simFlight, reviewing the same developer's Prepar3D build,
printed it plainly: "EUR 23.00 (+ tax for EU customers)". European buyers should
expect the number to move at checkout. FS Addon Compare, which normalises
everything to ex-tax dollars, puts this airport at \$23.30 and Double T's at
\$18.49 on the Marketplace, so the gap between them is real and not a currency
artefact.

What is in the box: both runways, the international and domestic terminals with
modelled interiors, animated SODE-style jetways matched to the real hoods,
animated departure and arrival boards that follow simulator time, the Asiana
headquarters, the National Aviation Museum of Korea, the Aviation Training
Center, the Metro Line 9 station with switching lights, the current Korean Air
building livery, and the 32R construction area as it stood in 2025. A GSX
configuration file has shipped since version 5.0.

What is not in the box: static aircraft. The aprons are empty unless you install
someone else's pack. And the military side of the field — Gimpo shares its
concrete with Republic of Korea Air Force units — appears nowhere in the feature
list, nowhere in the screenshots and nowhere in any source I could find. The
2022 forum question that went unanswered asked specifically about the western
stands. I could not establish what is modelled there, and I am not going to
guess.

What the community consistently praises

The terminals. This is the thing every positive review names. Seungwoo, a
Korean buyer writing on 21 May 2024, singled out the detailed interiors of the
international terminal and the SGBAC business terminal and asked for the same
treatment on the domestic side. The interior work is genuinely unusual at this
price: check-in rows, self bag drop, escalators, a departures board listing
Tokyo, Osaka and Beijing services that actually match Gimpo's real route map.

The jetways. The marketing promises hoods matched to the real airport's, and
this is the one claim that repeats in buyer reviews without contradiction from
2022 through 2024.

The ground layout, after May 2024. Version 2.0, on 16 May 2024, redrew the
taxiways and stands to the published AIP ground movement chart. Seungwoo, again,
confirmed the match. Before that update the layout was several years stale.

Performance. Nothing in the record complains about frame rates here, and
Seoul is a heavy area with photogrammetry and, for many owners, SamScene3D's
Seoul City WOW loaded on top. simFlight's Nadeem Z, reviewing the Prepar3D build
on 1 February 2024, called out "excellent frame rates, and good VRAM usage" as
the headline pro. (simFlight is sponsored by simMarket, which sells this airport;
weigh that accordingly. It is still the only long-form review of any version of
this product that exists.)

Persistence. Asian Airports has shipped Gimpo on FSX and P3Dv3/v4 (20 March
2019), P3Dv5, P3Dv6 (16 May 2024) and MSFS, and has updated the MSFS build ten
times in four years. This is a one-airport studio that has stayed on its one
airport for seven years. That is not nothing when the alternative was released in
2021 and has been rated one star by seven of its twenty-five Marketplace buyers.

What keeps coming up as a problem

The control tower was wrong for two years. Fixed. Kim-Dirk flagged it on 5
September 2022: the new tower "looks really tiny compared to the pictures I saw
of the real airport". Seungwoo repeated it on 21 May 2024. In between, a modder
called ironlemon got tired of waiting and published a fix on flightsim.to — 2.2
times bigger, and rotated 45 degrees, because the original had the entrance
tunnel parallel to the apron when the real one is angled. It has 559 downloads
and now carries a note at the top: obsolete, because Asian Airports fixed the
size and orientation in version 2.3. Two years to fix a landmark you look at on
every approach, and a customer got there first.

The AI ground routing needed rebuilding by someone else. Still open in the
base product. This is the most damning single document in the record, and it
is not a review — it is a mod description. On 22 August 2024, Ryanosaurus13, a
verified creator working with the AIG traffic community, published a
configuration overhaul for this airport whose feature list reads as a fault
report: hold-shorts missing "where aircraft would cross into active runways
without holding short"; taxi routes that took the long way round; remote stands
"too far backwards"; a "complete overhaul of gate radius" with all parking types
changed to appropriate ones; no airline-specific gate coding at all. 817 people
have downloaded it. Nothing in the changelog since suggests the underlying AFCAD
was corrected, though the mod is written to survive future updates.

No static aircraft. Still open. ixvst01's FSLTL static pack exists solely
because the aprons ship empty; 421 downloads. The Prepar3D sibling includes
statics, down to the Embraer Lineage 1000 that Blackpink used. The MSFS version
does not.

GSX did not recognise the airport. Fixed, eventually. A commenter on the AI
config page reported that GSX would not load a profile for it. Version 5.0, on
18 November 2025, shipped a GSX ini file.

Trees on the apron in MSFS 2024. Fixed on 18 August 2026. On 23 August 2025,
a user called Kampfheli3015 posted in the Seasons 2024 Enhanced thread on the
official forums asking Bijan to strip the trees out of Korean airports, because
Gimpo and Jeju were "flooded with trees alongside the taxi- and runways". Bijan's
mod eventually did it — "Removed trees from Gimpo International Airport" appears
in its changelog. Asian Airports' own exclusion landed in version 5.5, on 18
August 2026, described as "Exclusion added (trees at apron after MSFS2024
update)". A year, and a third-party seasons mod got there first. Again.

Night lighting was thin. Apron lighting was only reworked in version 5.2, on
28 December 2025, alongside winter and rain occlusion in the building interiors.
Anyone judging this airport's night look from screenshots or reviews older than
that is looking at a different product.

Small texture errors. Seungwoo noted the Korean Air logo on the cargo
building was reversed. Version 5.0 lists a new Korean Air logo on buildings
without saying whether that was the same fix.

Performance and stability

There is no performance complaint in this record. Not on the forums, not in the
store reviews, not in the mod comments. For a dense Seoul-adjacent airport with
modelled terminal interiors, that is a real result, and the LOD work in version
5.3 on 1 March 2026 — the Aviation Museum, the old terminal, the cargo hangars —
suggests the developer is still tuning rather than coasting.

The instability at Gimpo is underneath the scenery rather than in it. A report in
the official MSFS 2024 Airport and Helipad Issue Tracker from September 2025
describes the ground at RKSS breaking up into "large square tiles with random,
strangely shaped bodies of water, wrong ground materials" between the runways,
every time the sim loads. Korean satellite imagery is restricted for military
reasons, and the base data over Gimpo is poor as a result. An earlier bug report
from December 2022 flagged missing runways and misaligned layouts across RKPC,
RKSS and RKSI. A payware airport can only paper over so much of that.

One hard compatibility rule: this scenery and Double T's RKSS conflict. Install
one or the other, never both.

Who should buy it

If you fly Korean domestic — Gimpo to Jeju, Gimpo to Gimhae — buy it. The
RKSS–RKPC pair is among the busiest routes on earth and you will be looking at
this airport constantly. At €20.00, or €18.00 when it dips, it is the best
rendition available and the one Korean buyers on the store page recommend to each
other.

If you already own SamScene3D's Seoul City WOW, buy it. The two are built to
work together and three separate buyer reviews say so unprompted. This is the
combination the developer designed for.

If you own the FSX, P3Dv5 or P3Dv6 Gimpo from simMarket, buy it at €15.00.
That is a straightforward yes.

If you play on Xbox, or you buy through the in-sim Marketplace, you cannot buy
this — and you should not buy the alternative on faith. Double T's RKSS is
there at \$18.49 and it sits at 3.0 stars with 28% one-star ratings. Read those
before you spend.

If you fly exclusively in MSFS 2024 and expect a native 2024 airport, do not
buy this. SceneryAddons classifies version 5.3 as native to MSFS 2020 and
merely compatible with MSFS 2024, and as of today the simMarket listing is titled
"RKSS SEOUL GIMPO INTL AIRPORT MSFS20" with requirements that read "MSFS 2020" —
even though search engines still carry the old MSFS24/20 title and the tags still
include FS2024. It runs in 2024. It is not built for it.

If you want a fully dressed airport out of the box, do not buy this without
budgeting an evening. Empty aprons, AI routing that a third party had to
rebuild, and a handful of flightsim.to downloads standing between you and the
airport you thought you were buying.

Where it stands today

The version on sale on 20 August 2026 is the best this airport has ever been, and
it is measurably better than the version most of its reviews describe. Six of the
eight store reviews predate the May 2024 rebuild. All eight predate the GSX
profile, the apron lighting pass, the LOD work and the tree exclusion. The
headline 4.25 average — the store rounds it down to 4, which is its own small
injustice — is a verdict on a product that no longer exists.

What has not changed is the shape of the thing. Asian Airports is one person or
one small team with one airport and no website, selling through one store, in a
format Xbox cannot touch, with no marketing beyond a simMarket description and no
press beyond two short posts on a site that store sponsors. That is why the tower
stayed small for two years and the trees stayed on the apron for one: not
indifference, but no channel through which a complaint reliably reaches the
developer. The people who did get through did it by publishing a mod.

Buy it if Gimpo matters to you, and set expectations by the changelog rather than
the reviews. Then go and get the AIG config file, because the developer has not
matched it in two years and the man who wrote it has already done the work.