This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 抏 is uncertain. It visually combines 扌 (hand) with 元, but the original semantic or phonetic role of 元 in this character is unclear.
With no clear meaning, picture a hand (扌) holding a mysterious object (元) whose purpose is unknown.
For ガン, imagine a hand (扌) holding a gun (ガン) made of the 元 component: gun -> ガン.