Hi, does anyone know why there two different Gapcoin sites?
Gapcoin.org is the one mentioned in the OP and Gapcoin-project.github.io is the other site that also appears in search results. The binaries and Github repositories are also different between the two sites.
Gapcoin.org is owned by the original dev who abandoned the project and so cannot be updated. The gapcoin-project.github.io content is community-curated.
HTH
Graham