It's astoundingly unlikely Lucas' ideas for Star Wars 7, 8 and 9 will ever see the light of day. They were written as part of the negotiation with Disney for the sale of the Star Wars franchise and were ultimately rejected in favour of a script treatment written and supervised by Disney's own writers. As with any sale of Intellectual Property, these treatments are almost certainly covered by strict non-disclosure agreements on all side.
2008 interview with TotalFilm
TotalFilm: Are you happy for new Star Wars tales to be told after you're gone?
Lucas: I've left pretty explicit instructions for there not to be any more features. There will definitely be no Episodes VII - IX.
That's because there isn't any story. I mean, I never thought of
anything! And now there are novels about the events after Episode IV,
which isn't at all what I would have done with it.
The Star Wars story is really the tragedy of Darth Vader. That is the story. Once Vader dies, he doesn't come back to life, The Emperor
doesn't get cloned and Luke doesn't get married...
Lucas' scripts rejected by Disney
“They looked at the stories, and they said, ‘We want to make something
for the fans’….They decided they didn’t want to use those stories,
they decided they were going to do their own thing….They weren’t that
keen to have me involved anyway — but if I get in there, I’m just
going to cause trouble, because they’re not going to do what I want
them to do. And I don’t have the control to do that anymore, and all I
would do is muck everything up. And so I said, ‘Okay, I will go my
way, and I’ll let them go their way.'”
“They wanted to do a retro movie. I don’t like that. Every movie I
work very hard to make them completely different, with different
planets, with different spaceships, make it new,”
Abrams interview with Vanity Fair
He sketched out ideas for episodes VII, VIII, and IX, to be set
initially several decades after Return of the Jedi, and approached
Harrison Ford, Carrie Fisher, and Mark Hamill about re-upping. He
shared his story outlines with Disney during their courtship phase.
But after the deal was done, “Disney and Kathy decided they should
consider other options,” as Abrams (not then involved) diplomatically
put it. He said Lucas’s treatments had centered on very young
characters—teenagers, Lucasfilm told me—which might have struck Disney
executives as veering too close for comfort to The Phantom Menace and
its 9-year-old Anakin Skywalker and 14-year-old Queen Amidala. “We’ve
made some departures” from Lucas’s ideas, Kennedy conceded, but only
in “exactly the way you would in any development process.”