In the early 1980s, he worked on light pen technology for use with Apple and Atari systems, and in 1985, founded Gibson Research Corporation, best known for its SpinRite software.

[6] Gibson's engineering approach to understanding areas of interest inform his clear and direct delivery on the Security Now!

[8] He then founded Gibson Laboratories in Laguna Hills, California, in 1981, which developed a light pen for the Apple II, Atari, and other platforms before going out of business in 1983.

[17] In 2005, he launched a weekly podcast called Security Now with Leo Laporte on TWiT.tv, with its archives hosted on GRC's website.[18][19].

In 2006, Gibson raised the possibility that the Windows Metafile vulnerability bug was actually a backdoor intentionally engineered into the system.