Technically yes but the probable result is you’ll break the pretty Internet/status page of the GL GUI. If you’re comfortable w/ that you’re going to be going ‘out of support’ when it comes to GL as it requires, well, an unsupported configuration. If you’re fine w/ that notion, you’ll need some foundation skills before getting into remapping ports & adjusting firewall rules. See attached.
Combined w/ the fact I don’t have a Flint v2 but the single WAN version that is the Flint v1 you’re going to need to post screenshots upon request. I recommend Greenshot.