In addition to what BrBob said - why are you boycotting Ford for something as harmless to others as supporting homosexual activity (which if it came to it, I doubt anyone could ever prove, and it's mostly speculation)
I'd have thought the real gospel issue here was one of justice - what about boycotting the companies like Nike and Adidas that use sweatshops and child labour paid on a wage so low that it is almost impossible for them to live, just so that we can have cheap clothes. Isn't that so much more of a gospel issue?
Or in our role as stewards of God's creation, boycotting companies that make products from non-recyclable materials when there are alternative, sustainable sources which their products could be used for.
I have a funny feeling that the boycott of Ford is based on prejudices rather than God. Either way, I think there are so many more important gospel issues, issues of justice, to take a stand on, rather than whether a company allows to blokes to kiss