the Android OS, being GNU GPL (even if the specific implementation in many phones isn't), may better suit your wishes anyhow.
No. The Android System is licensed under the Apache license. Only the Kernel (which is Linux) is GPL'ed.
This won't help too much. There will always be ways to cheat. Especially if you know exactly how the server is checking the validity of the client.
The only solution is for the server to check if the client uses an unmodified version of the game. Exactly that is, what "trusted computing" is promising to deliver.
I still don't believe trusted computing is possible if the client has total control over his machine (is root) but at least in theory that's the only answer I can think of to solve the cheating problem.
"Experience has proved that some people indeed know everything." -- Russell Baker
