I just made a very fancy gumpaste monogram. I shaped wire to make the letter and then used gumpaste. Now I have 2 problems.
1. the letter is a G but because it's fancy it has a "hook" (scrolly curve) hanging from the right side. So it is lower than the base of the G and will touch the cake first. Any ideas on how to display this ? I was thinking some sort of fontant vase or something. If I do decide to stand it up on the cake (just closer to the front so the scroll hangs off the side), how do I get the monogram to stand up. It's very curvy. I've done simple letters and numbers, but this one is very curvy!

Any tips!?

When I do a #/letter for a topper I usually attach a skewer into it and use that to push into the cake once it has dried.

I, too, use a support to lift and stabilize the letters/doo-dads. I usually use a 20-guage wire, though, and kinda bend it to fit the lower half of the ornament if it is a rounded shape so that it comes straight down from the center bottom of the ornament. I then push a straw into the cake to hold the wire. Since yours is already made, maybe you can attach a wire or skewer to the back with chocolate?