the daemon compiled on my linux
now how do i get GUI ?

why do i have the feeling that this coin is a future dash killer?
No GUI on linux atm, so you have to use RPC calls to use it, or make a quick .php page if you need something 'visual'.
RPC call example w/ curl: curl --user user --data-binary '{"jsonrpc": "1.0", "id":"123", "method": "getinfo", "params": [] }' -H 'content-type: text/plain;'
http://127.0.0.1:9195/Jump on IRC if you need more info/help.