The most recent reports are the ones people should be paying attention to. There are numerous discussions about Gpal and its owner Ben Cannon on the Internet, and I can't say there's much there that inspires confidence.
Of late, it appears to be taking people months to get paid, with zero response from Gpal other than the initial issuance of ticket numbers. Users are asked to use the forums on Calguns for tech support, and posts there are not handled professionally (I've seen many screenshots of deleted threads, or threads edited by someone named "GpalVP" that change complaints into positive statements.)
If what I've read online is correct there are multiple law enforcement investigations from the Healdsburg PD, Sonoma County PD, and FBI, and there look to be many more as required licenses for transferring money were not acquired in at least 32 states that require them.
This is a mess. I have never used Gpal, but if what I've seen is any indication then you do not want to get involved in this right now. Don't put your money at risk.