How much does GMX charge for swaps?

Could you please elaborate on the fees charged by GMX for swaps? I'm interested in understanding the cost structure and how it compares to other platforms in the cryptocurrency space. Are the fees fixed or variable? Are there any hidden costs or additional fees that users should be aware of? Also, how does GMX justify its fee structure and ensure it remains competitive in the market? I'd appreciate it if you could provide a detailed breakdown of the fees associated with swaps on GMX. Thank you.