Mr Gulati, who had worked at Apple for almost eight years as a micro-architect, announced the job change through LinkedIn. He is now the Lead SoC Architect for Google. SoC stands for system on a chip.
He has at least 15 Apple patents related to chip design under his belt and will be key in Google's plan to build its own processors, CNBC reported.
Google is now expanding their team of chip experts so that it can build their own chipsets for future Pixel smartphones.
Mr Gulati was instrumental in Apple's bid to build custom chips for the iPhone, iPad and Apple TV. In the past, he has been responsible for the A4 and A9 chips which powered the 2010 iPad.
Apple currently builds its own smartphone processors but Google does not.
Apple's newest A10X chips, for example, are built-in house instead of by companies like Intel or Qualcomm. Qualcomm currently supplies its Snapdragon processor for Google's Pixel and Pixel XL smartphones.
Google's new hire could help the company differentiate Pixel from the multitude of smartphones by other vendors that run Android on Qualcomm (QCOM, -0.92 per cent) chips.
Mr Gulati's exit is seen as a set back for Apple (AAPL, -0.98 per cent), which has filed a number of chip-related patents that credit Gulati as an inventor.
He has also been employed by Broadcom and AMD.
If Google begins building processors in house, like Apple, it would potentially cut down on Google's reliance on Qualcomm, the report said.
Other firms, such as Huawei and Samsung, have also started to build chips in-house, allowing them to rely less on potential supply restraints from outside parties.
A spokesperson for Apple was not immediately available for comment, the report said.
Google confirmed that Gulati is now working for the company but declined to provide additional details.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)