don't worry about "where can I get" linux software. modern linux distros make that not a problem. you don't have to hunt for your software like you do in the windows world.
there's a nice organized package manager that you use to fetch and install the software you want. basically you'd open this package manager program up, search for "wine", check the right packages, and hit install. rather simple.
WINE is basically a compatibility layer for Windows programs. It lets you run certain Windows executables under Linux/Unix. It ain't perfect, but it's good enough depending on what programs you need to use.
with regards to Game Maker:
http://appdb.winehq.org/objectManager.php?...cation&iId=2965it seems to work with some minor issues in WINE depending on what version of GM you use.
And there's Mupen64Plus for N64 emulation, which is a damn good N64 emulator for Linux that's being very actively developed. (I actually make packages of it for Fedora when I have the time, which means when I get off my ass and submit it to the right repo, a Fedora user would be able to open the package manager, look for "Nintendo 64 emulator", find my M64+ package and install it)