Looks like not only can it be done - its a must ! Tubeless GS riders (you know who you are), tube up !
Upgraded rims with TPM installed are available for the GSA and being built by the company you mentioned at dinner. They have a good tech dept and speak my language. I have use them before, great service very knowledgeable.
So, when can we expect the build to order "Vortex" edition ?