Pronunciation: [ɡˈʌnpe͡ɪpə] (IPA)
Correct spelling for the English word "gunpaper" is [ɡˈʌnpe͡ɪpə], [ɡˈʌnpeɪpə], [ɡ_ˈʌ_n_p_eɪ_p_ə] (IPA phonetic alphabet).