#When Leah saw that

"When Leah became aware that"

#she took Zilpah, her servant, and gave her to Jacob as a wife

"she gave Zilpah, her servant, to Jacob as a wife"

#Zilpah

This is the name of Leah's female servant. See how you translated this in [[:en:bible:notes:gen:29:23|29:24]].

#bore Jacob a son.

"gave birth to a son for Jacob"

#This is fortunate!

"How fortunate!" or "What good luck!"

#called his name Gad

Translators may also add a footnote that says "The name Gad means 'fortunate.'"