Yes. I was able to move a few e-mails from WLM to Gmail after setting up a Gmail account in WLM, using WLM settings. The procedure was nasty and will be nasty going forward, but it can be done.
I won't go into detail. I think Rick can probably hack through it once IMAP is set up -- AND AND AND once Gmail is set up so that nonsecure third-party apps are allowed to access one's Google account.
I don't think moving folders will work for me. It will be a matter, I think, of (a) establishing destination folders in Gmail at gmail.com, then (b) copying a few dozen messages at a time from WLM folders to the Gmail folders.
It's the usual nasty nasty Windows nastiness, but nothing new to veterans, ONCE the IMAP nastiness is effected.