Encrypt from memory to disc?

[Steve Leibel]

I have an application where I have data in memory that needs to be 
encrypted without ever being written to disc, even temporarily.

Using PGP I can run "pgp -feat" and then pipe the data to the pgp 
process. That works very well.

I have to do the same thing for GPG, but I can't figure out how to 
send data to GPG directly from memory.

Any suggestions greatly appreciated.