The Gorgan character only in few films?

Actually, the titles are "The Gorgon" (correct spelling) and "7 Faces of Dr. Lao".

Also, there is this one:
Medusa Against the Son of Hercules aka Perseo l'invincibile (1963)

~~MystMoonstruck~~

what about Malpertuis?

Medusa also is a major character in the TV miniseries "Voyage of the Unicorn".

There is an odd episode of "Tales from the Darkside" that has Medusa in modern times. It's very offbeat, but it's always been a favorite of mine though it's very bleak.
Miss May Dusa
IMDb synopsis:
A mannequin comes to life but everyone she looks at in the eyes becomes stone.
IMDb review:
"Miss May Dusa" starts late one night as a woman (Sofia Landon) meets a blind saxophonist named Jimmy James (Gary Majchrazak) in a subway. They start to talk to each other; it turns out that she can't remember much about herself, not even her name. Together they come up with the name May Dusa, which sounds familiar to her. They fall in love with each other, but May has a secret that might get in the way.
http://www.imdb.com/title/tt0716960/

Here's Medusa's character page on IMDb:
http://www.imdb.com/character/ch0026842/

~~MystMoonstruck~~

And there are waaaaaay too many lesbian vampire flicks.