I find GPA easier to use than gpg, but gpa doesn't seem to work in SLINT.
I've installed SLINT twice and it didn't work with either installation, I
have Debian installed on the same computer and gpa works on Debian.
I found a lot of keyservers now don't always work but I found one that is
both fast but always works:
hkps://gozer.rediris.es:11371
Maybe Didier would try that and if he likes it change the default gpa
settings to make it the default keyserver it works better than the gpg pool
that is default on gpa.
Best wishes,
David
