[pessimizer]

You can't shim GNS into looking like DNS to the OS?

[schanzen]

You can. Either using nsswitch plugins or a local DNS service that resolved the names in GNS. But, browsers are delicate when it comes to TLS certificates, for example. See also https://www.ietf.org/archive/id/draft-schanzen-gns-19.html#n...