mainwheel,
I can, and I have. I've also got the ASM and AMM - I think it's wired correctly but I have a feeling it's the ARINC labels I'm sending to it. If I could somehow get a list of the labels being sent on FMGEC GE-1 that it's expecting I'd be over the moon because then I could rule out if it's wiring or ARINC that's the problem!
Alas, the only way to get that (as they aren't in AMM) is from Thales directly, or some nice person who has an oscillascope and a spare FMGEC knocking around (not likely).
Here's hoping still