Even US cars vary from the norm sometimes. My '94 Ford Thunderbird had the filler on the right side. I would sometimes have to pull the car around in the other direction after having absentmindedly parked to the right of the pump.
I've personally thought the logical way is to have the filler on the driver's side, no matter the market, but that would certainly add complexity to multi-market vehicles like ours. My logic is that we right-side drivers (notice my deft avoidance of the term "right-
way"

) tend to steer and park to the right side of things when there's no reason to do otherwise. That goes for filling pump islands and even square-box convenience stores that sit in the middle of a concrete slab. We typically park in an anti-clockwise direction around objects - to the right - of whatever, so having the filler on the left of our cars goes along with what just feels right for the side of the pump island on which we would tend to park. If my logic holds, you would normally tend to park to the left of the island and having the filler on the right with the driver's door would feel most normal.
Your keyhole is on the passenger door? So if for some reason you don't use the remote, you unlock the car on the passenger side and then have to walk around to enter the driver's door? Now that to me would be, as I guess you might say, a royal pain in the arse! Don't we have keyholes on both doors? Geez! Now I'm gonna have to go have a look!