Later GX did have fake wood but my GX is later reg than that & does not have the fake wood but imports can vary in spec of course, however a basic car check shows that one registered 14/5/99 which is likely the date of reg after import with original registration being before March 99 to be an S. Reg does reassuringly check out as a grey/blue as likely rather than the silver marked in the ad.
Often the speedometer is corrected by a face plate to you get the MPH but the odometer still shows KMH. Does not appear to have the UK spec bumper lights. Not sure if that is a problem as an import. The reflectors in the bumper appear smaller to me than the light clusters would have been so may not be able to swap so easily IF you do want that. As an import it may not have locking rear diff but that may not bother you.
Check for any signs of water in the ATF as well as rad condition. If you get an auto then flush and fill and change filter. Mine looked fine and the rad was fine but I did need an transmission rebuild a few months down the line as a clutch jammed because of a stuck valve (mileage was about 206,000 ish IIRC). (Great service by Suffolk Automatic Transmissions - no affiliation).
Would definitely get a history check before parting with cash. I have used mycarcheck.com (no affiliation) but there are others of course.
Twin battery was part of the Northern Spec seemingly more commonly known as the Winter Spec which also had the heated fuel filter housing although these can be picked up used for about 30 quid. Pros & cons with the twin battery but wouldn't worry in UK unless using with veg oil as may help with colder starts and warming of fuel with the heated filter. Downsides can be weight and one battery dying taking the other with it.
MOT History
www.check-mot.service.gov.uk shows last 2 were straight through passes with no advisories and no suggestion of corrosion needing welding which is hopefully reassuring but how much depends on the tester and what has happened since. Hopefully being in the south then there is likely to be less snow / ice & corrosive salt on the road but who knows where it's been before that. Reading the MOT history can sometimes be really useful to give an idea how well things have been looked after. I know it is mentioned in the ad but may be useful to mention the service for future readers who may not be able to access the ad.