@Hussam-Al-Hertani The 18.06 based OpenWrt '/18.06-SNAPSHOT/packages/mipsel_24kc/packages' repo contains the gpiod-tools and libgpiod packages quite a long time ago.

So each OpenWrt 18.06 based Omega2 firmware from v0.3.2 b217 supports them too.

# Omega2+ FW v0.3.2 b217 ... b223 root@Omega-5BE1:/# opkg info gpiod-tools Package: gpiod-tools Version: 1.0.1-1 Depends: libc, libgpiod Status: unknown ok not-installed Section: utils Architecture: mipsel_24kc Size: 11963 Filename: gpiod-tools_1.0.1-1_mipsel_24kc.ipk Description: Tools for interacting with the linux GPIO character device (gpiod stands for GPIO device). root@Omega-5BE1:/# opkg info libgpiod Package: libgpiod Version: 1.0.1-1 Depends: libc Status: unknown ok not-installed Section: libs Architecture: mipsel_24kc Size: 8004 Filename: libgpiod_1.0.1-1_mipsel_24kc.ipk Description: C library for interacting with the linux GPIO character device (gpiod stands for GPIO device). root@Omega-5BE1:/# opkg install gpiod-tools Installing gpiod-tools (1.0.1-1) to root... Downloading http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/packages/gpiod-tools_1.0.1-1_mipsel_24kc.ipk Installing libgpiod (1.0.1-1) to root... Downloading http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/packages/libgpiod_1.0.1-1_mipsel_24kc.ipk Configuring libgpiod. Configuring gpiod-tools.