Not available as a part of Gingerbread with Google, but you can do one of several other things. You can go to Google.com/calendar and log in. When it asks to take you to the mobile version, choose no (or you can do the same while on Google's search page, and then select calendar under "More" and "More" again). Once there, you'll have access to the normal search tool for the desktop Google calendar (which syncs with the mobile Android calendar).
Or you can download "Business Calendar Free" which gives you that functionality in a very nice package. I am sure there are plenty of others, including Jorte, but for me this works nicely. I also like CalendarPad which gives a nice widget.