To me, Gypceros is as irritating as ever, but staying under it gives alot of advantages. There, I can land plenty of charge attacks(Great Sword), Demon dance under it (Dual swords), and I can even plant a Pit Fall Trap RIGHT UNDER IT. It also gives me a chance to use healing items. I recommend to not do this always because sometimes it runs forward and starts lashing its tail, catching you off-guard. You will take minor damage when it stomps on you with its feet.
Fact: It it does the tail whip attack(turning around and hitting you with its tail), its like its actually looking for you when you are under it
You can use any item you want, including Pit Fall Traps