A great dumpster dive, but now I have questions!

Today I was out and about, and I was able to rescue an old Apple II GS out of the trash!

Awesome!

I was able to fire it up and it tries to boot from the floppy drive, but says no boot device. It has a monitor, 3.5", and 5" floppy disk drives.

Cool. You're ready to go.

1. I have no input for it. Do I need a special keyboard or mouse.

Yes. Well, you don't really need a mouse. But you do need a keyboard. You can use any old Apple ADB (Apple Desktop Bus) keyboard you happen to have (or find via eBay, etc.).

Where can I get one?

eBay. Friends with big attics. Craigslist. You name it. Just not at a computer store.

Can I use my standard PS/2 keyboard?

No.

2. More complicated, where can I get old software for it. I would love to get some old games or something for it. Can I download such things off the internet?

Yes. Visit http://www.virtualapple.org/ to try out software; scroll to the right on the page to download the virtual disk image, suitable for running in an emulator or transferring to the IIgs.

I assume I would have to put them on a floppy disk.

Yes.

I only have a Windows XP PC (With a floppy drive). Can I download such software? Would I need a special program to properly format a disk to be read by the apple II GS?

Yes, you can download the software - but your PC can't write disks that the IIgs can read. You need to get the virtual images down to the IIgs to write for itself. Start here: http://adtpro.sourceforge.net

You're most of the way there, old Mac ADB keyboards and mice will work with the GS. The computer booted from a system file loaded on a floppy with the program you wanted to run.

As for SW, maybe with luck your local second hand store though the one's around here don't. Also eBay and perhaps a local MUG or club....

Kevin