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diff --git a/lib/axlsx/stylesheet/gradient_fill.rb b/lib/axlsx/stylesheet/gradient_fill.rb
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+# -*- coding: utf-8 -*-
+module Axlsx
+  # A GradientFill defines the color and positioning for gradiant cell fill.
+  # @see Open Office XML Part 1 §18.8.24  
+  class GradientFill
+
+    # The type of gradient.
+    # @note 
+    #  valid options are
+    #   :linear
+    #   :path
+    # @return [Symbol]
+    attr_accessor :type
+
+    # Angle of the linear gradient
+    # @return [Float]
+    attr_accessor :degree
+
+    # Percentage format left
+    # @return [Float]
+    attr_accessor :left
+
+    # Percentage format right
+    # @return [Float]
+    attr_accessor :right
+
+    # Percentage format top
+    # @return [Float]
+    attr_accessor :top 
+
+    # Percentage format bottom
+    # @return [Float]
+    attr_accessor :bottom
+
+    # Collection of stop objects
+    # @return [SimpleTypedList]
+    attr_reader :stop
+    
+    # Creates a new GradientFill object
+    # @option options [Symbol] type
+    # @option options [Float] degree
+    # @option options [Float] left
+    # @option options [Float] right
+    # @option options [Float] top
+    # @option options [Float] bottom
+    def initialize(options={})
+      options[:type] ||= :linear
+      options.each do |o|
+        self.send("#{o[0]}=", o[1]) if self.respond_to? o[0]
+      end
+      @stop = SimpleTypedList.new GradientStop
+    end
+
+    def type=(v) Axlsx::validate_gradient_type v; @type = v end    
+    def degree=(v) Axlsx::validate_float v; @degree = v end    
+    def left=(v) DataTypeValidator.validate "GradientFill.left", Float, v, lambda { |v| v >= 0.0 && v <= 1.0}; @left = v end    
+    def right=(v) DataTypeValidator.validate "GradientFill.right", Float, v, lambda { |v| v >= 0.0 && v <= 1.0}; @right = v end    
+    def top=(v) DataTypeValidator.validate "GradientFill.top", Float, v, lambda { |v| v >= 0.0 && v <= 1.0}; @top = v end    
+    def bottom=(v) DataTypeValidator.validate "GradientFill.bottom", Float, v, lambda { |v| v >= 0.0 && v <= 1.0}; @bottom= v end    
+
+    # Serializes the gradientFill
+    # @param [Nokogiri::XML::Builder] xml The document builder instance this objects xml will be added to.
+    # @return [String]
+    def to_xml(xml)
+      xml.gradientFill(self.instance_values.reject { |k,v| k.to_sym == :stop }) {
+        @stop.each { |s| s.to_xml(xml) }
+      }
+    end
+  end
+end