Spider-Gwen will be one of characters in Spider-Man: Into the Spider-Verse animated movie produced by Columbia Pictures, Marvel Entertainment and Sony Pictures Animation coming out on December 14.
Spider-Gwen first appeared in Edge of Spider-Verse 2 published by Marvel Comics created by Jason Latour and Robbi Rodriquez. Gwen Stacy aka Spider-Gwen appears in an alternate earth. In this earth, Gwen got bitten by radioactive spider instead of Peter Parker (Spider-man).
A recent copy of Edge of Spider-Verse 2 CGC 9.8 sold for $465 on December 4.