The attached ebuild (diff) & patch allow gpsbabel to build and run on Gentoo/FreeBSD. I can check these in if you want; let me know. I'll keyword ~x86-fbsd when this is done. Thanks!
Created attachment 122097 [details, diff] gpsbabel-1.3.3.ebuild
Created attachment 122098 [details, diff] files/gpsbabel-1.3.3-freebsd.patch
Patch sent upstream? Btw, 1.3.4 is out.
No, I did not send it; I figured you'd want to handle communication with upstream, but let me know if I can help.
done in 1.3.4