Oh, I didn't see a authored characer called Edgar, I guess it was just an example though...It just made me think FFVI Edgar there for a second.
Also, I was thinking of a way to properly incorperate any of the characters from Magness. By the end of the alternate dimension which Gil finds Glenn (& before him an alternate Lucca[I call her Elle] & afterwards an alternate Flea), he possesses both the Pendant & a Gate Key. He obtains these items to have access to the End of Time (with his party of Marcy from a Keystone future 1020, his alt Lucca, alt Glenn, & alt Flea).
I thought that if he came upon Gaspar as or slightly before he comes to know about the ZEAL Project, that Gil would immediately want to seek out ZEAL, his main goal being to find his sister or to find a working Time Egg to change things. I thought that this way, he (and probably Flea) would be captured by ZEAL...Marcy, alt Lucca & alt Glenn would either stay in the EoT or possibly travel to into the new Toma-Keystone timeline. I would be very open to killing of Flea & Glenn down the line in the story for some purpose or another, but Marcy & alt Lucca are important for Gil's later story.
Either that or I'm sure I could even work out Marcy & alt Lucca beforehand somehow. If I were to have Gil, I don't think he'd have much of a big part in the story. He basically would be a prisoner. Especially with how powerful the ZEAL people seem to be, it would be hard for him to escape.
I could imagine using my Glenn, but this seems like a real possibility for how he gets there in the first place...I wasn't sure about him because I really haven't written his part out yet...