Most people working for tech startups (as opposed to for Google itself) don't make anywhere near that salary, especially not outside the major US tech hubs. This campus would have been a startup incubator, not a regular Google office.
That said, yes it would have still contributed to gentrification in a less extreme way than a true Google office.
A low cost of living is also a benefit to bootstrapped software/web companies (small blogs, niche publishers, other online content creators).
But gentrification still happens without big dollar companies showing up. It's often a side effect of the success of the arts in the area. As the wealthy kids move in to be hip and cool, and the businesses that enjoy their money move in afterward, rents go up and creators are pushed out.
That said, yes it would have still contributed to gentrification in a less extreme way than a true Google office.