GeeXLab 0.9.x.x is available with Lua 5.3 and one of the new features of Lua 5.3 is the native support of 64-bit integer numbers. In previous versions of Lua, only double precision floating numbers were available (fp64).
Lua: float to integer

3D Programming, Prototyping, Pixel Hacking and Gamedev with GeeXLab Proto-Engine
GeeXLab 0.9.x.x is available with Lua 5.3 and one of the new features of Lua 5.3 is the native support of 64-bit integer numbers. In previous versions of Lua, only double precision floating numbers were available (fp64).