This type of Place is always drawn as an Area Place. It is one of the Car services sub-categories. They should be mapped to the edges of the property (or at least to the drivable area of the gas station). Gas station places should be connected with Parking Lot Roads without streetname.
There is more information contained in an Gas station Area than can be viewed in WME, such as available fuels and corresponding prices. Per country four fuel types are available, which are shown for all gas stations. Gas stations always get the name in the format <Brand> <Name Gas station>, for example “Shell De Rotonde”. Choose the Brand from the drop down menu. Leave this option blank if the brand is not listed.
Use as brand name for gasoline stations the core <Brand> without an Express extension. If all Express stations are renamed to the core brand, the brand names with the Express extension will be removed from the dropdown list.
To distinguish between gasoline stations of the same brand, located on both sides of a highway, the direction can be added to the streetname. Add behind the street name ri plus a short indication where that side of the highway leads to.
If the gas station also includes a shop, you can choose that as a secondary category. If the shop has different opening times, for instance when at night gas taking is still possible via automatic payment, make an extra Point Place for the shop and categorize it as “Convenience Store”.
The global Wiki has an extended description of Gas Stations. If there are differences in the guidelines, remember that the guidelines in the BeLux precede when applied to the map in Belgium, the Netherlands, or Luxembourg.
Gas stations in the BeLux are locked at level 3 or as high as your own level. On highways, as part of a Service Area they are locked on the same level as the road.