1) Act the slack-jawed yokel 2) Be a looky-loo 3) Dropped-jaw stare 4) Gape 5) Gawk 6) Goggle 7) Look 8) Look stupidly 9) Look with amazement 10) Stare in wonder 11) Stare open-mouthed 12) Stare open-mouthed, to a Brit 13) Stare openmouthed to a Brit 14) Stare stupidly 15) To gawk 16) To stare stupidly or rudely 1) Gape 2) Goggle 3) Look 4) Ogle 5) Stare 
Gawp is British slang for to stare stupidly; gape.