The two bits in bold - firstly, what behaviours were MGP and his associate exhibiting that made you think or indeed assume he might be gay? (e.g. if they were holding hands or kissing or in some way acting flirtatiously etc then it would be a reasonable assumption to make, otherwise enjoying a meal with someone regardless of their gender suggests absolutely nothing about their sexuality or whether they are in a sexual relationship. I must have had literally hundreds of meals and/or nights out with male friends and business associates - some of them on many occasions - but I can't imagine anyone would have ever thought "I wonder if oldjamfan is gay" - or maybe they have, I don't know?).
Secondly, there is no 'implication' to the question. It was a perfectly straightforward question as to what made you think MGP might be gay - I have heard other people make the same suggestion and could only assume that it was based on a slightly effeminate/androgenous appearance. You seem to have taken offence at the fact that I am calling you out for making a massive assumption about someone based on I-don't-really-know-what, and named him on a public forum.