Can I mine this coin using GPU? Is it still profitable using my desktop computer with a good GPU card by joining in a mining pool?
Why mine when you can buy and park?
Why not both...?

When minig is still profitable then its a shame to not to mine. What kind of graphic card do you have? Did you try to calculate profits? If not, you can do it here:
https://bchain.info/MNX/tools/calculatorIS there any hardware comparison about how much hash rate you can get from most popular mining hardware?
RX 570: 1150 core clock 8000sol/s,88 watt power usage.
RX 560: 1150 core clock 5000sol/s,42 watt power usage.
RX 480: 1170 core clock 8400sol/s(9000 on 1290 core clock-100 watts),92 watt power usage.
Ubuntu 16.04 ,AMDGPU-PRO 17.40-049 blockchain driver.