I have been using Jasmin SMS gateway for sending SMS with GSM 7 Characters but not all characters where received in hand set.
I tried using coding 0,8 etc I tried to sent the message - '@ £ $ ¥ è é ù ì ó ç LF Ø ø CR Å å Δ _ Φ Γ Λ Ω Π Ψ Σ Θ Ξ ESC ƒ æ Æ ô ö ò û ù ÿ Ö Ü é ß Ü ä'