On average, listings lease in the $20's per square foot per year. The Gilroy region is seeing a a boost in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Silicon Valley market, the Gilroy submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 29 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 14% of the available leases in the Gilroy are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 610 sqft. Most properties in this market are close to 1 floors. Most buildings in this region were built in 1914 and are Class A.