You don't need MiamiDx, just any TCP/IP software will do (Miami, Genesis, Roadshow, AmiTCP). And you don't need any separate SSL library. At least according to the readme Google Drive Handler has its own SSL library (a port of OpenSSL) built in. You only need to set the SSLROOT assign right.
http://aminet.net/package/comm/tcp/GoogleDrive_handler_68k