Sync Gateway only works with Couchbase Server. Couchbase Lite versions before 2.0 can work directly with CouchDB. 2.0 introduces a new sync protocol, and is no longer compatible with CouchDB. Have you considered the community edition of Couchbase Server?
Also, in the “server” entry, you need to specify the transport (e.g. “http://1270.0.1:5984”). That’s the source of the current error you’re reporting.