Gonzalez managed to get trespass a good 70 yards into the restricted area and even manage to get to the front door of the White House, which was unlocked. Former Secret Service agents reported to the Washington Post that this intruder actually got around Five levels of security including, plainclothes agents outside the fence, an agent at the guard booth, an attack dog, the SWAT team, and a guard at the front door. The head spokesman for the Secret Service has declined to say anything about the investigation to Washington Posts and had said that there is no way that an anonymous source could know the plans to guard the White House.
The Washington Post informs us that there was a surveillance tape that shows a dog and men fallowing Gonzalez but by that point he had already reached the front door of the house. Washington Post also informs us that the reason Gonzalez was running towards the White House was because he wanted to tell the president that the "atmosphere was falling." According to reports there was also an agent on the porch, his stationed position for that night is yet unknown. The agent on the porch could have shoot the intruder but for some reason hesitated to do so. The report says that Gonzalez was let go and it was said that it did not seem like he had any mental illness.
link: http://www.washingtonpost.com/politics/new-details-in-fence-jumping-reveal-failures-in-security-rings-around-white-house/2014/09/23/043518ea-434a-11e4-b47c-f5889e061e5f_story.html?hpid=z3