There are plenty of places in the manual where is explained how GSX decides if a parking is too small, and the multiple options you can use to deal with it. For example:
- The which tells you can still use a "too small" parking, if you really want, at Page 11.
- The explanation of the "Max Allowed Wingspan" parking customization feature at Page 36.
- The explanation of the "Ignore Wingspan when parking" global settings, which is used to tell GSX to always ignore the parking size, at Page 30.