Gain Pro X is a Proof of Work (POW) blockchain which uses the Ghostrider algorithm. Ghostrider was explicitly created for Gain Pro X, and is designed to keep speciality hardware such as ASICs or FPGA off the Gain Pro X network.
CPU mining is still the most efficient way to mine Gain Pro X, but GPUs can also be used. GPU mining however, is not as efficient as CPU mining.
Wyvern CPU Miner
XMRig CPU Miner
XMRig CC CPU Miner
WildRig GPU Miner
You can mine Gain Pro X on ARM devices using Wyvern Miner, as well as XMRig. Both have to be compiled for ARM platforms, and work best on ARMv8. This is experimental and not officially supported. Mining on mobile phones is not advisable due to potential dangers involving lithium batteries and overheating.
Gain Pro X Pools
You can see a list of Gain Pro X mining pools on Mining Pool Stats. https://miningpoolstats.stream/