"Everything is super."
"Geil" is very colloquial for "good/cool/great" and maybe "super". I would not really try to learn it: up to maybe 30 years ago, it only had the meaning "horny" (in the sexual sense), and somehow was then started to be used as "cool". It will sound strange when used by a foreigner.
Geil is an word that was started to get used from younger people in their youth language and now the young people say something is "voll porno". I would never use this in firmal language. It both also has meanings in sexual language. E.g.: Somebody is "geil" if he wants to start sex and the body is ready for it in dirty language.