[torstenvl]

Why not just use DDG !g search as your default search?

E.g., in Firefox, bookmark

https://duckduckgo.com/?q=!%s

and save it with the keyword gg (or whatever)

Now whenever you enter gg searchterm in your location bar, it's the same as searching !g searchterm on DDG.

[uranusjr]

If I understand correctly DDG !g simply redirects you to Google so this is effectively the same as using Google plus a superfluous redirect.