Yes, gal is a Scrabble word!
...and is worth 4 points in Scrabble, and 6 points in Words with Friends
gal
Noun
1. United States liquid unit equal to 4 quarts or 3.785 liters
2. A unit of gravitational acceleration equal to one centimeter per second per second (named after Galileo)
3. Alliterative term for girl (or woman)
What Scrabble words can I make with the letters in gal?
3 Letter Words
2 Letter Words