It can happen sure. Is it normal? Let's explore first. For the most part, guys in gyms seem to keep to their own, or buddy groups - only rarely peeking around. But, we are also curious creatures. I'm not saying that in some hint-hint, super sexually charged or latent homosexual way. But in the way of, we'll notice if a dude is phenomenally ripped, fantastically handsome, tatted up and down his legs, scarred from nipple to bellybutton, dressed in a bright pink faux-fur bath robe, owner of a nut suck that's peeled to his knee caps, or dreadlocks to his toes, and, or yes, a penis of pitiful or praiseworthy proportion. A brief stare can and will occur. Not a violent, drooling, I-need-that-man-wrapped-around-my body,let's-fly-to-Rome-for-the-weekend-look, but a look.
If you are a man of note: body builder, seven footer, long white bearded, brutally obese or dashingly handsome - your being checked out is not surprising. But, I suppose the key is how do you define "checking out"? Checking out has a sort of leering sexual quality to it. Not just a look of noticing, but a look laced with arousal.
Without knowing more about what you're putting out there, it's impossible to say. Is it possible some guys want to jump you sexually, sure? But on the whole, being consistently eye-humped by multiple men in a gym isn't terribly common. Unless it's a bathhouse.
Without you mentioning more than that - that's all I got. Depending on how it strikes you I suppose, keep doing or not doing that locker-room voodoo that you be doin' so well.
Perfect answer funny guy! Not everything is sexual! In the gym locker room I once saw a guy walking out of the shower with a wang hanging to his knees. I took second glance, not because I was interested, because it was like OMG! WTF!!!
The dude didn't bat an eye. I suppose he was smart enough to know I had no sexual innuendo or agenda.