Hi @Celian_GTRD, welcome to the community and to OpenZiti (and zrok/BrowZer)!
I've never used GNS3 myself. We had a forum user use it a year or two ish ago, you can see the discourse post here: https://openziti.discourse.group/t/help-with-example-reflect-server
I don't know if or how it would matter or what it might entail. Sorry about that. If it's like any other linux machine you can do a quickstart type install (i'd recommend host it anywhere) or for a more production style deployment the deployment guide should work too. Controller Deployment | OpenZiti
Dunno if that helps but if you run into issues, let us know how we might be able to help.