Hey HEALers here are some directions to get to SFGH from SFSU:

Take the SFSU free shuttle or the 28 bus(both pick up on 19th,
bus=$1.50) to Daily City Bart Station.

Buy ticket to 24th & mission, (it costs $2.30 one-way)

Once you arrive @ 24th and mission you can either take the 48 bus
(which will take you down 24th till portero), the SFGH shuttle or
walk about 10-15 minutes down 24th till you hit potrero Rd.

The hospital is at 1000 Potrero Rd. between 23rd and 22nd.

(For further assitance in planning your public transportation trips,
check out www.transit.511.org, click on trip planner on the left and
fill in your starting and ending points).

Hope this is useful.

Cheers!
Maria