It has.
I wouldn’t say there’s a specific reference deployment since each provider will utilise different mechanisms for provisioning CPE devices with configuration. Off the top of my head, some options you can use here: Flat files, REST APIs, RADIUS, some custom OSS/BSS DB lookup?
Different providers have different methodologies so there’s no one-size-fits-all.
All I can suggest is deploy it. Ask questions. I will say that unfortunately the documentation is not the greatest for GenieACS… The scripting side/sandbox elements drive me nuts… (e.g. why can I not get some of the HTTP headers for the SOAP request?) and the DSL for provisionioning is a little terse and will take you a while before you stop tearing your hair out…
~ R