This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 豙 is uncertain. It appears to combine 立 (stand) with 豕 (pig), but the original meaning and component relationship are unclear.
A pig standing under a roof: the top 立 looks like a standing figure or roof, and the bottom 豕 is a pig. Imagine a pig standing upright, but its purpose is unclear.
For ギ, imagine a pig wearing a gi (martial arts uniform) standing proudly: gi -> ギ.