Download Nick Kidd's Ground Services Sound Pack v2.0 for GSX (by FSDT).

Ground Services Soundpack v2 brings new, more realistic voices and sounds to your ground operations. It features new, re-worked high quality audio files. Regional voice sets are assignable to the ground operations of your choice! Select ambient boarding sounds - whether your aircraft is at a gate, or on the ramp. It comes in a new easy to use installer so that you can choose your sound set at any time - even in flight. Best of all? It's freeware for the flight simulator community. It is an audio enhancement for FSDT's excellent GSX add on for FSX and Prepar3D and will not work unless you have a registered version of GSX. Ground Services Soundpack v2 is freeware developed by Nick Kidd and brought to you by Aviationlads.

Audio examples:

If you like Ground Services Sound Pack, feel free to drop a donation.
We really appreciate your support! We are continuously working
on improvements and new sound presets which will be included in further updates.
(Remarks: Donation for Ground Services Soundpack (GSS) - this will ensure we provide the money to Nick Kidd)

Video review by Kent Wallace:

You need to own Ground Service X by FSDT - you can buy this product here:

Ground Service X - Base pack (minimum requirement!)
https://secure.simmarket.com/fsdreamteam-gsx-ground-services-for-fsxp3d-(de_7893).phtml
Ground Service X - Level 2 Expansion (optional!)
https://secure.simmarket.com/fsdreamteam-gsx-level-2-expansion-fsx-p3d-(de_11973).phtml