I did actually just go on to the GLADD website there as you'd mentioned for a quick look at how they presented themselves ( very professionally btw) .......and found mainly just normal every day news / photo op pics being used. I think perhaps you're maybe slightly underestimating your client base somewhat to suggest that by simply putting cute guy bodies in an Ad it's a sure way to get attention or sell your product - perhaps if you're selling lubes and condoms maybe, but "professional services" hmmm perhaps not....but I guess that all depends on the images used. Many solictors are using gay themed Ad pics now to attract gay customers but that tends to be more "smart" Ad's with either humour or Culture pics perhaps rather than some guy with come fuck me eyes and sweat running down his chest maybe.
Anyway, you seem to have it all worked out and your "gays buy by eyes" seems to be your sure and certain route for your sales drive so I'll just leave you to it and wish you all the best with it, I would just also add that based on the Ad's companies use "gays may also judge said companies and their product by their eyes" too of course.