ianal, but i believe that using it to connect to your service would not require you to release the code of your service. You'd only be required to release the code of any modifications to the Gate One software. (that is, i personally would not interpret it as making your service a "derivative" of the terminal emulator.. Maybe a lawyer could make that case though.) either way though, nothing stops you from making him an offer, provided he has the full rights to relicense it for you.