Gwen is from an alternate universe where she was bitten instead of Peter Parker. In the regular continuity, Peter failed to save Gwen Stacey from a tragic death. In Spider-Gwen's universe, the opposite happened.
Like her counterpart, she's usually very snarky.
She's not always had the best relationship with the law.
And she's had her share of problems.
But let's face it, she's your new favorite.