Well, I try to do some exercises daily after work, but the problem is that I don't really have time to eat before going to my gym.
Is it bad? What do you think?

I think it's not very good, because when doing physical efforts, you lose energy, and your only source of energy is food. Unless you're a plant

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In vino veritas...

You have to eat something rich in proteins, like fish or eggs.
Otherwise a 30-min jogging will make you lose 1g of muscles

Does it really matter? You use glycogen as your energy anyways and after 20 mintues or so you burn that up then you start working on your fat deposites for energy.

Careful - risk of throwing up if you eat too much and go to gym

Thanks for the info guys.

Eat healthy and it wont matter!

Good advice %)

I usually don't eat and just bring along my bottle of water.
It's more than enough.