The __all__ variable forgot to expose the gcd() function.
diff --git a/Lib/fractions.py b/Lib/fractions.py
index 8ac1dfa..0d85f15 100755
--- a/Lib/fractions.py
+++ b/Lib/fractions.py
@@ -9,7 +9,7 @@
 import operator
 import re
 
-__all__ = ["Fraction"]
+__all__ = ['Fraction', 'gcd']
 
 Rational = numbers.Rational