EyeFind Maps is a mapping system mentioned in the radio of GTA V. The site is operated by EyeFind. Lester mentions it a few times during the storyline to give whereabouts to the player. The service is opposed by Liberal activists, and is obviously a parody of Google Maps.
It is also mentioned in the mission Friends Reunited by Wade while getting closer to Floyd's apartment. Wade says he saw it on the maps, then guides Trevor to it, while he can simply see the path on his GPS.
The service gained controversy after Weazel News reported that Eyefind Maps sends cars with sophisticated cameras to map every street and house of America, including the inside of them.