No “gun” in the title, but anything that is actually performed with real cannons certainly qualifies as a gun song. The exciting part is near the end, for those not familiar with it. It’s a famously rousing piece, at least the ending. The rest has a narrower appeal.
Tchaikovsky is one of the big names in classical music. He was Russian, born in 1840. If you like classical music, you likely know about him, or at least OF him, and if you don’t, nothing I say will change your mind, most likely. But an interesting factoid was that he made an appearance at the inauguration of Carnegie Hall.