What is the meaning of "Gong Xi Fat Choi"  

Gong Xi Fat Choy - A Chinese New Year Gift
Thats about all I could find really so I expect its something to do with the Chinese New Year.
Maybe if you had a more in depth google than I did you might find a better answer.

that i know, it means likes "HAPPY NEW YEARS, HOPE YOU WILL GET THE BEST THIS YEAR". Seems like that bro. And why always colour in red, because chinese people think that red is a lucky colour. That just my opinion because i'm not chinese

You might see it around as "Gung Hei Fat Choy" (or variant of that spelling), depending on the dialect but anyway that saying is basically the equivalent of "Happy New Year", or what you will say on New Year's Day. Loosely translated it mean "Congratulations and be prosperous" - basically welcoming in the new year with fortune on your side. Or something like that.
To the Chinese, the red is has an immensely positive connotation, symbolising courage, loyalty, fertility and fortune (as well as others). This is why red is often used in celebrations - it's a cultural superstition where the Chinese believe that it'll bring them luck. Kind of like how people in the WEstern societies believe that a 4 leaf clover can bring luck.

the accurate type should be "Gong Xi Fa Cai",that mean wish u could have got much fortune.spring festival is coming.May mylotters here will have a bright tomorrw,happy everyday.