I guess you learned the hard way, but always use only aquarium safe silicone. The silicone like you used has those chemicals in it, that are designed to kill stuff like mold, algae, etc. It will take some work, but I think your tank is salvageable. It's hard to tell without waiting to see what happens, the plants may live but probably be badly affected with some melting, death, or severe wilting. The fish will probably slowly die, they may live but suffer a lot and be stressed which may lead to death on down the line.
I would first start by tearing down your tank and removing all décor, plants, etc. The fish could live in a large, clean, 5 gallon bucket for a few days. If you can install your filter on the bucket, great if not, may need to do daily water changes. Thoroughly clean and rinse all décor, plants, etc. and maybe soak in clean uncontaminated water for a day or so. While everything is out of the tank, I would remove any of the GE Silicone II that you used. A good utility knife will help cut and trim out any of that silicone. Once any of the possible bad silicone is removed, clean out the tank well, rinsing thoroughly. Then reseal what is needed with aquarium safe silicone. Let it cure and dry well. Then you should be able to set your tank up. You may want to do a water change daily for the first week, just to be sure any leftover residue or contaminates are gone.
Hope this helps and good luck.