Under the hood
Helvetica is available from Fonts.com and MyFonts.
Gibson is available from Adobe Fonts, Fonts.com, Fontspring, MyFonts, Typekit and YouWorkForThem.
Lucida Grande is available from Fonts.com and MyFonts.
Related samples
by
Gibson, Helvetica, Helvetica Neue with Lucida Grande in action on thisismyjam.com