First part: the gold and the red are incomplete dominants with each other, so if you are using a true red then you will get all brassy reds, where the gold shows through. If you are using a brassy red, then that one already has the gold gene and statistically speaking you will get one brassy red and three golds per four.
Second part is the blue lacing, which is also an incomplete dominant trait where the "blue" is actually both black and splash genes showing together, so a GLW will act as a black for lacing, and if the red is a blue, then you get half black laced and half blue laced (statistically speaking). If you use a splash laced red, then you will have all blue laced.
The GLW was used to create the BLRW, and in some lines can be teased back out into phenotype ... which is what I am doing with my GLW project since I have a breeder one county over who does BLRWs with great body and (to her frustration) are still brassy. I expect my first F1 chicks to hatch either tomorrow or Tuesday! So excited ... then I'll have another batch due to hatch the 22nd or 23rd, so next month I ought to have some pics when they start to feather out.
Just in case there is any doubt: I geek out on the genetics aspect of breeding.