yes it has in many stores
Example: which store in UK or usa
GTA San Andreas is available on the PS2, but not on the PSP.
no
No the game does not have a PSP version
you cant
Nowhere it doesn' exist.
No you can't . They aren't compatible
nope there is only gta vice city stories or gta liberty city stories for psp
yes it is liberty and vice and san andreas ones
yes
you cant play gta san Andreas online psp only ps2 ps3 xbox 360
GTA: San Andreas Stories for the PSP has been released in Japan already. For the PS3 and the 360, maybe in between the end of '09 or the beginning of '10. PC will most likely be released in the middle or end of 2010.
As far as I can see, there is no GTA San Andreas available on the PSP. I believe it is PS2, Xbox and PC only. However, if you want to double check, suggest you have a look at the gtawikisite.