Water is forming on the floor. Appears the water is pooling under the crisper drawer, then seeps through the seal. GE TBX 18CI. Any ideas?

water condensation? Usuallya s a result of bad door seals allowing air into the fridge and then the moister condensates and becomes water at the bottom of fridge or drawers

check the drain on the refrigerator side also you may have to disconnect to open the panel and clear with hot water or a heat gun.

Replace door seals

I'm sorry to say that it sound as though your door gasket may no longer be sealing correctly.

For me, it's simply a task of getting a replacement gasket for that make and model.

To remove the old one you would, simply, peel the inside of the gasket toward the outside of the edge of the door revealing the mounting screws. Remove these screws all the way around and replace with the new one in the same fashion...

The reason that I recommend this is that humid air outside of the refrigerator can seep past a worn gasket and condense on the inside surfaces making its way to the bottom and into those drawers.

You may have a leaking door seal, check for gaps in the door seal.

1. take all things out from freezer
2. open back wall of freezer
3. clean the drain hole in the bottom middle
   
4. put all back
   
5. good job you fix it
   

This sounds like the water line from the icemaker and the cool water reservior inside the refridgerator side. The line is a rigid plastic hose and could be a leak at one point that is small enough to allow water to run along the line. Also sounds like you have a humidity problem. Check the door seals and wipe them off and apply a thin coat of die-electric grease to the seal. this will help keep it pliable and soft.
The water in the bottom leaks into a trough that is made into the fridge. This usaully evaporates, This is for the auto-defrost. It keeps the water from getting on the floor.
Check to see if the outer door gets hot at the edges. If not, It may not be auto-defrosting.
I would first check the water line first as this seems to be a more serious issue right now. The line is probably loose at one of the connections between the ice maker and water reservior.

Your defrost drain hole is frozen closed.
Remove the back freezer panel and defrost the ice with a hair dryer.
Once the drain is clear poura 1/4 cup bleach in the drain hole.

no connection between lower drawer and water dispenser, however there is a water tank behind the crisper's storing water for the dispenser, its possible that there is a hole in the tank or a connection is leaking there and dripping water. remove all 3 crisper's and give a look at it. try getting water from dispenser while your checking (Might only leak when water dispenses

check behind the drawers is there a water tank for water in thew door that would be my first guess