Tuesday
Can we add our local channels from a digital tv antenna to Google TV Streamer?
Wednesday
No, Google TV Streamer does not accept the signal from a digital TV antenna.
You would attach that antenna to your TV's input and then switch the input and view those channels using your TV's remote control
Wednesday
What TV standard you intent to use?
If it's ATSC, the only option is to use an HDHomeRun network tuner which uses your LAN to stream the TV channels.
If it's the DVB-T/T2 standard let me know.