Actually, now that I think about it, the DGBE on a standard guitar, when capoed on the 5th fret gives you GCEA, so if I swapped out the D for the high E, and tuned that to d, it should give me dGBE. I don't really care if its not gCEA, just tuned so the ukulele chord shapes would be the same fingerings, so I don't have to relearn new chords (I'm lazy!).
I realise that when I'm playing a chord, it won't be the correct name (ie: the G on a uke is the same fingering as a D on the guitar) and my brain will be telling myself G when a tuner will be saying D. I don't play in a band, so don't need to be in tune with anyone else but me.
I have been thinking the same thing Darren... how has it worked for you? Makes perfect sense to do this since there is a ton of ukulele tab, song charts, etc. out there. The lower tone should sound good too. String selection would be an important part to work out.