ぐるみ

ぐるみ goes straight after a noun for a group – a town, a company, a family – and means the whole group, everyone in it, takes part. With で it describes how something is done; with の it comes before another noun.

It combines with a small set of nouns: まち町, むら村, ちいき地域, くに国, がっこう学校, かいしゃ会社, そしき組織, かぞく家族. Apart from かぞく家族ぐるみ, which is everyday vocabulary, it belongs to news reports and formal writing.

Wrongdoing

With a company or an organisation, ぐるみ usually means the wrongdoing was not one person's doing: the whole body was in on it.

ぐるみ or 全体

ぜんたい全体 only gives the scope: all of the town. ぐるみ says the town acted together as one.

• × 町ぐるみが雪で白くなった → 町全体が雪で白くなった

みぐるみ身ぐるみ, "everything you have on you", is a set word built the same way and appears almost only in みぐるみ身ぐるみはがされる, "be stripped of everything".