The version of that book I remember came out long before there was GW-BASIC, in fact, it came out just before there were microcomputers and you might type them into a PDP-8/10/11. I bought a copy at the DEC store in the Mall of New Hampshire circa 1980.

Some of the games used features that were not supported on most microcomputer BASICs but you could type most of them into a TRS-80 or Apple ][ without changes and you could run all of them with minor modifications. Fun times!