Funny, I thought you were smarter than this.
Is it a GEMS '99, or a Motronics '99?
That said, the later years of the GEMS were more robust as far as the electrics were concerned, but you'll still have potential problems with the fusebox and water ingress, heater core o-rings, lock assemblies are failing left and right as they get older, window regulators fail on a daily basis (I really should start stocking them).
If it's a Motronics, make the seller put plug wires on it before you buy it and make sure they are Magnecors! Also, make sure it has the newer plenum deicer assembly on it. Buy an MAF and transmission position switch to keep in the glove box, just in case!
PT