Headline isn't misleading for gay people. We know and have always known that in this country being gay is a reason that can be used to deny us services, to fire us, to deny housing, etc. depending on where we live. In Florida they are making gay teachers take pictures of their spouses off their desk and to never tell their students they are gay if they want to keep their job. It isn't that much of a stretch for those schools to also start retaliating against students who are open about being gay. We've seen schools use all kinds of tactics to discourage gay kids from organizing, from being open, etc, with them not enforcing bullying rules when the target is gay, by disallowing any kind of gay groups or even gay straight alliance groups, by firing teachers who come out, and any number of other things.
So yeah, when I see that the Republicans are against this, I am specifically seeing that Republicans want to make it easier for schools to use breakfasts/lunches as a tool to keep gay people in line.