What does bonnie and blythe and good and gay mean?

This is from the children's nursery rhyme

Monday's child is fair of face,

Tuesday's child is full of grace,

Wednesday's child is full of woe,

Thursday's child has far to go,

Friday's child is loving and giving,

Saturday's child works hard for a living,

But the child who is born on the Sabbath Day

Is bonnie and blythe and good and gay.

Bonnie = pretty / attractive

Blythe = lighthearted / joyous / free spirit

Good = you know what that means ジ

Gay = happy / carefree