diff --git a/cocotbext/eth/gmii.py b/cocotbext/eth/gmii.py
index c75a7fa..e0adfc7 100644
--- a/cocotbext/eth/gmii.py
+++ b/cocotbext/eth/gmii.py
@@ -110,6 +110,9 @@ class GmiiFrame(object):
     def __iter__(self):
         return self.data.__iter__()
 
+    def __bytes__(self):
+        return bytes(self.data)
+
 
 class GmiiSource(object):