Yes, gild is a Scrabble word!
...and is worth 6 points in Scrabble, and 8 points in Words with Friends
gild
Verb
1. Decorate with, or as if with, gold leaf or liquid gold
Noun
1. A formal association of people with similar interests
What Scrabble words can I make with the letters in gild?
3 Letter Words
2 Letter Words