First, this forum is English only.
In any case, from what I can gather from your message, it seems you haven't understood how GSX works: GSX doesn't have ANY notion of the outside scenery, the only information it has, it's from the AFCAD, it doesn't know anything about nearby buildings.
There's an automatic placement system based on the AFCAD parking spot radius, which works most of the time but, especially with 3rd party sceneries, which are usually more detailed, so it's possible vehicles might end up inside a building.
Which is why, there are options to customize the parking position, with the ability to specify Left/Right radius or individually place vehicles to adapt to any scenery, and why there's a Scenery Sharing Area in the forum, were users can share customization files for specific sceneries.
