GAMFT gives you multiple options for handling this type of transfer.
Initially, we provide Encrypted Folders. In general, this allows you to have files dropped into a location by your customer where the file is Encrypted while at rest. Initiating a Work Flow Process will allow you to move/copy/extract/decrypt/etc the file and process as needed.
We do handle PGP/GPG encrypted files within our Work Flow process as well. If you do not use the Encrypted Folders option above, then this would be your next option. Have the Trading partner send you data encrypted with your public PGP key, then decrypt it on the fly after receipt of the file, process etc.
These are just 2 of the options you have ... but, to answer your question, yes ... we can provide the Secure Folders you need for Business Partners to transfer/send files securely from start to finish.