Yes... it is common on a lot of Gradys.
There are 2 places where they can leak. Around the metal frame and the rubber weather stripping.
Remove any old sealent and clean around the frame with mineral spirits. Re-caulk with a silicone sealent. I like "Life Seal".
You can carefully remove the rubber weather stripping, (it has a groove that locks it into the frame) clean out the gook from the tracks in the frame, load it up with sealent and re-install the stripping, then wipe off the excess. Usually it's the bottom strip.