This is the keymap I use on my gergo.

#Installation

git clone https://github.com/qmk/qmk_firmware.git

cd qmk_firmware

git reset --hard ddcb1794fa

echo "LAYOUTS = gergo" >> ./keyboards/gergo/rules.mk

mkdir ./layouts/community/gergo/

git submodule add https://git.sr.ht/~mlb/gergo_replicant ./layouts/community/gergo/replicant

make git-submodule

make gergo:replicant:dfu