These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.10 s (backtrack: 0/20).

[ebuild  N     ] media-libs/giflib-6.1.3:0/7::gentoo  USE="-doc -static-libs" 460 KiB
[ebuild  N     ] sci-biology/libgtextutils-0.6.1-r1::gentoo  268 KiB
[ebuild  N     ] dev-perl/File-Which-1.270.0-r1::gentoo  USE="-pwhich -test" PERL_FEATURES="ithreads (-debug) -quadmath" 25 KiB
[ebuild  N     ] dev-perl/PerlIO-gzip-0.200.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 19 KiB
[ebuild  N     ] sci-visualization/gnuplot-6.0.5::gentoo  USE="X cairo gd readline -amos (-aqua) -bitmap -doc -examples -gpic -latex -libcaca -libcerf -lua -metafont -metapost -qt6 -regis -tgif -wxwidgets" LUA_SINGLE_TARGET="lua5-1 -lua5-3 -lua5-4" 7400 KiB
[ebuild  N     ] dev-perl/ExtUtils-PkgConfig-1.160.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB
[ebuild  N     ] dev-perl/GD-2.830.0-r1::gentoo  USE="truetype -animgif -examples -fcgi -test -xpm" PERL_FEATURES="ithreads (-debug) -quadmath" 281 KiB
[ebuild  N     ] dev-perl/GDTextUtil-0.860.0-r3::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 64 KiB
[ebuild  N     ] dev-perl/GDGraph-1.560.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 160 KiB
[ebuild  N     ] sci-biology/fastx_toolkit-0.0.14-r1::gentoo  531 KiB

Total: 10 packages (10 new), Size of downloads: 9213 KiB