Gays are a successful demographic - they are usually educated, have good paying jobs and no wives/kids to support. Companies want to make $ and gays have $ to spend. The secular magazines would be dumb NOT to include points of interest for gays.
It’s a free country - if you don’t want your $ going to magazines who support the gay culture, don’t buy the magazine. I think it’s crazy to expect the secular magazine to cater to our religious beliefs - just as crazy as it was for the gays to be so freaked out over Chick Fil A’s founders supporting man/woman marriage. Don’t like it? Don’t eat there.
Works both ways IMO.
I generally don’t bother to boycott any business based on who they support because where does it end? Don’t give your $ to the magazines - but do you drink Starbucks? They support Planned Parenthood I’m told. So does my favorite grocery store - Trader Joes. All the big named companies Procter & Gamble, Johnson & Johnson etc. etc. all support causes I wouldn’t - so am I going to boycott all those products? Apple - maker of my iPhone that I LOVE and the makers of my Subaru probably support causes I wouldn’t. Am I going to ditch my phone and take the bus? I could I suppose - and eventually it would come down to me sewing my own clothes and growing my own food - no thanks.
One could argue that by you checking the magazines out of the library, your demand for them causes the library to purchase them, even if you don’t. They’re still getting $ from you - even if it’s indirectly. See what I mean? Where does it end?
Gays aren’t going anywhere. They are part of our society. They are our neighbors, brothers, sisters, coworkers, teachers, friends. I say we just learn to live and let live. If they get a small paragraph in a magazine listing points of interest to them - how does it hurt us?

The world does not revolve around you. It doesn’t care if you’re on holiday.
Perhaps you should develop better coping skills so you don’t get so distraught over the way strangers live their lives. Nobody is asking you to accept it - you can continue to be disgusted and have dampers put all over your plans just by the knowing there are gays congregating in your vicinity … or you can decide to live and let live and just go about your merry way.
Life is short. I’d rather be happy then be so bothered over things and people who aren’t hurting me in the least.