How to use gvim with greek letters?

[Daffy]

First of all, I didn't know in which sub-forum to put this. Hope it's the right place...

For some days now, I'm trying to find info in how to enable greek typography in gvim*.

It seems now that I can write in Greek in browsers and LibreOffice after a small modification in xorg.conf under input method:

Option "XkbLayout" "us, gr"
Option "XkbOptions" "grp:ctrl_shift_toggle"

and fixed the bug in the symbols with

cd /etc/X11/xkb/symbols/pc/
sudo ln -s gr el

But now I'm somehow stuck. I know that OpenBSD since 4.8 accepts unicode, but from further reading I see that to display a single character, I have to do a certain key combination. For some letters, it's okay. For a big text, it's painful... Is there any way to just change language and start typing in gvim.

*The only reason that I say gvim and not vim, is that because as a gtk application, I suppose that it will be easier...

Can someone provide more info?