SODE it's a freeware module, used by several scenery developers, and we use it to handle jetways in the following sceneries:
KIAH and KMEM
We also plan to upgrade all our past sceneries using SODE jetways too, which are more realistic, reliable and flexible. So, if you use any of these sceneries, SODE it's mandatory, otherwise jetways will not work.
Even if you don't have KMEM/KIAH, GSX uses SODE to integrate with SODE jetways made by other scenery developers too, so their operations will be part of the GSX ground handling operations, so they'll be easier to use, and will be able to use the GSX airplane configuration data for the doors, so you'll have only one place to worry when configuring a plane.