This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 竩 is uncertain. It visually combines 立 (stand) and 宜 (good, suitable), but the original semantic and phonetic roles are unclear.
With no clear meaning, picture a person standing (立) beside something suitable (宜), but the purpose remains a mystery.
For ギ, imagine a person standing beside a suitable object, giving it a 'gee' (ギ) of approval, even though the meaning is unclear.