PreSelect from Existing Dropdown

Trying to use the URL to pre-populate or pre-select from a dropdown selection box and it just is simply not working.

In the form I’m using:

[select gift_destination “HolyLands|WAPSUHLNTD:N” “BBLiteracy|WAPSUBBLTD:T” “Schools&Scripture|W17APJANTD:T” “Chaplains|W17APJANNTD:N” “Cambodia|WCAMLTD:T” “Need-Most-TD|WCAMLGENTD:T” “Need-Most-NTD|WCAMLGEN:N” “Indigenous|WAPISCR:T”]</p>
[dynamictext gift_destination “CF7_GET key=’gift_destination'”]

So the URL I’m using for example is:

https://sitename/?gift_destination=Cambodia

But it’s not working. It works if it’s a general field, you can add anything you want, but this particular form talks to a 3rd party API, so the use of the codes is important.

I’ve tried many different coding that I’ve found online, but nothing works yet!

Thanks.