gaup

As a noun gamp

is (uk|dated) an umbrella.

As a verb gaup is

(geordie) to stare, gape.

As verbs the difference between gaup and jaup

is that gaup is (geordie) to stare, gape while jaup is (scottish|northern england) to splash; to slosh.

As a noun jaup is

(scottish|northern england) a splash.

As verbs the difference between gaud and gaup

is that gaud is (obsolete) to bedeck gaudily; to decorate with gauds or showy trinkets or colours; to paint or gaud can be to sport or keep festival while gaup is (geordie) to stare, gape.

As a noun gaud

is a cheap showy trinket.