You may want to check the gauge of the track as compared to the Gilbert track, I acquired a few of the K-Line 10" straights and used them when my layout went together. You will be OK with Gilbert and Flyonel locomotives but I found that my American Models locomotives wobble through these sections, the 10" sections I have are stamped K-Line and are a little narrow on the gauge. The wide radius curves may not have the same problem but it might be a good idea to check the gauge before installing on a layout.
Ray